Subscribe to Category 2.4.17

Does Subscribe to Category work with WordPress 5.5.3 and PHP 7.4.8? A smoke test was performed on .

Summary

Errors
123PHP notices
No JavaScript exceptions
All test pages loaded successfully
No resource errors
Performance

Memory usage: 189.24 KiB
The average PHP memory usage increased by this amount after activating by the plugin.

Page speed impact: 0.177 seconds
The average page load time increased by this amount after activating the plugin.

Environment
WordPress version5.5.3
PHP version7.4.8
MySQL version8.0.21
PHP memory limit256M
Plugin Info
Last updated
Active installs 1,000+
WordPress.org page https://wordpress.org/plugins/subscribe-to-category/
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Pages 6

Plugins ‹ Test site — WordPress

Page screenshot: Plugins ‹ Test site — WordPress
URL /wp-admin/plugins.php?plugin_status=all&paged=1&s
Requested URL /wp-admin/plugins.php?action=activate&plugin=subscribe-to-category%2Fsubscribe-to-category.php&plugin_status=all&paged=1&s&_wpnonce=d77d65ee1f
Aspect after-activation
HTTP status 200
Load time 0.841 s
Memory usage 2.89 MiB
JS errors None
Resource errors None

STC Subscribe

Page screenshot: STC Subscribe
URL /wp-admin/admin.php?page=stc-subscribe-settings-submenu
Aspect menu-item
HTTP status 200
Load time 0.399 s
Memory usage 2.76 MiB
JS errors None
Resource errors None

STC Subscribe → Notifications

Page screenshot: STC Subscribe → Notifications
URL /wp-admin/edit.php?post_type=notifications
Aspect menu-item
HTTP status 200
Load time 0.436 s
Memory usage 2.92 MiB
JS errors None
Resource errors None

STC Subscribe → Subscribers

Page screenshot: STC Subscribe → Subscribers
URL /wp-admin/edit.php?post_type=stc
Aspect menu-item
HTTP status 200
Load time 0.394 s
Memory usage 2.89 MiB
JS errors None
Resource errors None

Test site – Just another WordPress site

Page screenshot: Test site – Just another WordPress site
URL /
Aspect front-page
HTTP status 200
Load time 0.334 s
Memory usage 2.67 MiB
JS errors None
Resource errors None

Widgets ‹ Test site — WordPress

Page screenshot: Widgets ‹ Test site — WordPress
URL /wp-admin/widgets.php
Aspect new-sidebar-widgets
HTTP status 200
Load time 1.175 s
Memory usage 2.82 MiB
JS errors None
Resource errors None

Benchmark

URL Load time Memory usage
Inactive Active Change Inactive Active Change
/wp-admin/index.php0.471 s0.898 s+0.427 s2.75 MiB2.89 MiB+ 135.51 KiB
/wp-admin/edit.php0.212 s0.473 s+0.261 s2.8 MiB2.94 MiB+ 149.73 KiB
/wp-admin/post-new.php1.546 s1.630 s+0.084 s4.54 MiB4.97 MiB+ 435.24 KiB
/wp-admin/upload.php0.539 s0.596 s+0.057 s2.63 MiB2.77 MiB+ 139.7 KiB
/wp-admin/options-writing.php0.173 s0.387 s+0.214 s2.64 MiB2.75 MiB+ 112.04 KiB
/wp-admin/media-new.php0.215 s0.375 s+0.160 s2.6 MiB2.75 MiB+ 144.92 KiB
/wp-admin/edit-tags.php?taxonomy=category0.194 s0.425 s+0.231 s2.64 MiB2.78 MiB+ 144.58 KiB
/wp-admin/post-new.php?post_type=page1.422 s1.610 s+0.188 s4.53 MiB4.95 MiB+ 424.97 KiB
/wp-admin/options-discussion.php0.365 s0.469 s+0.104 s2.61 MiB2.75 MiB+ 144.55 KiB
/wp-admin/edit-comments.php0.232 s0.448 s+0.216 s2.65 MiB2.78 MiB+ 135.64 KiB
/0.333 s0.337 s+0.004 s2.56 MiB2.67 MiB+ 114.76 KiB
Average 0.518 s0.695 s+0.177 s3 MiB3.18 MiB+ 189.24 KiB

Additions

Things that the plugin adds to the site. This section is not intended to be comprehensive. The test tool only looks for a few specific types of added content.

Options wp_options 2

Custom Post Types 2

ID Name
notificationsNotifications
stcSubscribers

Sidebar Widgets 1

ID Name
stc_widgetSubscribe to Category

PHP Error Log 123 lines

[29-Nov-2020 13:01:44 UTC] PHP Notice:  Trying to access array offset on value of type bool in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:44 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:44 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:44 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:45 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:45 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:45 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:46 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:46 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:46 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:46 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:46 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:46 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:46 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:46 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:46 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:46 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/classes/class-stc-settings.php on line 163
[29-Nov-2020 13:01:46 UTC] PHP Notice:  Undefined index: daily_time in /wp-content/plugins/subscribe-to-category/classes/class-stc-settings.php on line 527
[29-Nov-2020 13:01:46 UTC] PHP Notice:  Undefined variable: disabled in /wp-content/plugins/subscribe-to-category/classes/class-stc-settings.php on line 718
[29-Nov-2020 13:01:46 UTC] PHP Notice:  Undefined index: notifications in /wp-content/plugins/subscribe-to-category/classes/class-stc-settings.php on line 763
[29-Nov-2020 13:01:46 UTC] PHP Notice:  Trying to access array offset on value of type null in /wp-content/plugins/subscribe-to-category/classes/class-stc-settings.php on line 763
[29-Nov-2020 13:01:47 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:47 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:47 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:47 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:47 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:47 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:47 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:47 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:47 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:48 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:48 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:48 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:48 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:48 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:48 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:49 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:49 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:49 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:50 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:50 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:50 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:50 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:50 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:50 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:50 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:50 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:50 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:50 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:50 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:50 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:50 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:50 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:50 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:51 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:51 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:51 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:51 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:51 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:51 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:52 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:52 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:52 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:52 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:52 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:52 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:52 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:52 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:52 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:53 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:53 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:53 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:53 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:53 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:53 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:53 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:53 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:53 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:54 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:54 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:54 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:54 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:54 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:54 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:55 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:55 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:55 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:55 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:55 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:55 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:55 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:55 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:55 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:56 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:56 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:56 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28
[29-Nov-2020 13:01:56 UTC] PHP Notice:  wp_enqueue_script was called <strong>incorrectly</strong>. Scripts and styles should not be registered or enqueued until the <code>wp_enqueue_scripts</code>, <code>admin_enqueue_scripts</code>, or <code>login_enqueue_scripts</code> hooks. This notice was triggered by the <code>stc-subscribe-addon</code> handle. Please see <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 3.3.0.) in /wp-includes/functions.php on line 5229
[29-Nov-2020 13:01:56 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:56 UTC] PHP Notice:  Undefined offset: 0 in /wp-includes/wp-db.php on line 1319
[29-Nov-2020 13:01:56 UTC] PHP Notice:  Undefined index: cron_time in /wp-content/plugins/subscribe-to-category/subscribe-to-category.php on line 28

(+23 more lines)
See also: All tests for this plugin, How to Hide Subscribe to Category Admin Menus