Hi James,
yes I have deactivated all plug-ins and also have switched to a standard WP theme. However, this also didn’t fix the problem.
Then I remembered, that the error occurred at a time when I played around with different page editors like Gutenberg, Classic, etc.
Both editors were not any longer in the list of my plug-ins. So I tried to reinstall them again. Now, surprisingly after I have installed the classic editor, the error message is gone. Does this make sense? Is the classic editor a precondition to use Events Calendar?
Best regards,
Carsten
