Plugin could not be activated because it triggered a fatal error.

Hello,

We apologize for the issue you are facing with the Rank Math plugin. It seems that the Repair Action Scheduler plugin did not resolve the fatal error due to an obsolete database schema.

Here are a few steps you can try to fix this issue:

1. Backup Your Database: Before making any changes, ensure you have a backup of your database.

2. Manually Delete Obsolete Tables: If you are comfortable with it, you can manually check your database for any obsolete Action Scheduler tables and delete them. This may require access to phpMyAdmin or a similar database management tool.

3. Use Code Snippets: You can also try using a code snippet to delete the option related to the Action Scheduler schema. Here’s how:

   • Go to the Snippets menu in your WordPress dashboard and click Add New.
   • Name the snippet and add the following code:

     add_action( 'init', function() { delete_option( 'schema-ActionScheduler_StoreSchema' ); } );

   • Select ‘Only run in administration area’ and save the changes.
   • After saving, deactivate the snippet and try activating Rank Math again.

4. Clear Cache: Make sure to clear all caches, including server cache, after making these changes.

If these steps do not resolve the issue, we recommend replying to your ticket with your site URL so that a human agent from our support team can assist you further. Thank you for raising this concern, and we hope to help you get this resolved soon!

Sources:
Fatal Error Happening on Some Installations After 1.0.49 Update » Rank Math