Cannot update custom fields

Everytime I try to edit a custom field I get the error message
Table 'databasename.#__acymailing_fields' doesn't exist
Any ideas?

Maybe it happens because you have the plugin Events Booking - Acymailing plugin published but don't use ACYMailing on your site?

Unpublish that plugin that solves the issue (might need to clear cache after unpublishing)

Or access to My Downloads menu item, download the latest package, upgrade to your site should solve the issue, too

Tuan

Perfect, thanks Tuan