I am trying to delete some of our bigger events (registrations over 1000).
I have managed to delete all old smaller events but two with over 1000 registrations both show this error when trying to delete them: An error occurred and the job has been stopped. Please refresh the page to try again.
I have checked our server error logs but it does not show anything in there.
Strange! So when an error like the above is happening it usually means a fatal error being thrown and those are usually stored in the server’s error logs.
Try adding this to your site’s wp-config.php file: