Thank you for looking into this!
Environment:
WordPress: 7.0
PHP: 8.3.31
Theme: Academica 2.1.3
The error started happening when working with the settings of an unrelated plugin: “Simple Membership Plugin” (simple_wp_membership). Any changes under “Category Protection” triggers the WP error “Your site hit a critical error. Suspected plugin: Simple Calendar 4.0.3” and the “Uncaught TypeError: explode()” error in wp-content/plugins/google-calendar-events/includes/admin/bulk-actions.php(204) as described in the original post.
Looking at the Simple Calendar code:
https://plugins.trac.wordpress.org/browser/google-calendar-events/trunk/includes/admin/bulk-actions.php
it seems the function custom_bulk_admin_notices() is triggered as a add_action(admin_notices) hook. Perhaps in this case the variable “ids” is an array instead of a string as expected by the explode() function.
