Products Review Reminder [Support Thread]

[Bruce1952]

Hi All,

As usual when an update is made the modules fall down.

I have done a clean install of zencart 2.1 and added this module to it which is product review reminder.

As expected it does not work and I am getting this message coming up on the page when I click on tools/product review reminder:

This page requires updates for the next Zen Cart version. Please refer your site developer or plugin author to this documentation.

This is what the error log is showing:
[12-Dec-2025 04:27:10 UTC] Request URI: /admin/index.php?cmd=addon_review_reminder, IP address: 45.125.247.117, Language id 1
#0 [internal function]: zen_debug_error_handler()
#1 /admin/includes/header.php(71): trigger_error()
#2 /admin/addon_review_reminder.php(291): require('/home/a1ntacdk3...')
#3 /admin/index.php(16): require('/home/xxxx...')
--> PHP Deprecated: This page requires updates for the next Zen Cart version. Please refer your site developer or plugin author to <a href="https://docs.zen-cart.com/dev/plugins/admin_head_content/" rel="noopener noreferrer" target="_blank">this</a> documentation. in /admin-panel/includes/header.php on line 71.

[12-Dec-2025 04:27:10 UTC] PHP Fatal error: Uncaught Error: Undefined constant "remove" in /admin/addon_review_reminder.php:423
Stack trace:
#0 /admin/index.php(16): require()
#1 {main}
thrown in /admin/addon_review_reminder.php on line 423

[12-Dec-2025 04:27:10 UTC] Request URI: /admin/index.php?cmd=addon_review_reminder, IP address: 45.125.247.117
--> PHP Fatal error: Uncaught Error: Undefined constant "remove" in /admin/addon_review_reminder.php:423
Stack trace:
#0 /admin/index.php(16): require()
#1 {main}
thrown in /admin/addon_review_reminder.php on line 423.

[12-Dec-2025 04:27:10 UTC] Request URI: /admin/index.php?cmd=addon_review_reminder, IP address: 45.125.247.117
--> PHP Fatal error: Uncaught Error: Undefined constant "remove" in /admin/addon_review_reminder.php:423
Stack trace:
#0 /admin/index.php(16): require()
#1 {main}
thrown in /admin/addon_review_reminder.php on line 423.

Any assistance on how to fix this issue would be appreciated because I don't know what they are talking about in the link it supplied: https://docs.zen-cart.com/dev/plugin..._head_content/