I checked before upgrading just now to the latest version of mailcow and roundcube worked fine but after the upgrade I can no longer access roundcube. I get a 500 error. Can someone tell me what has changed in the latest version so I can fix my RC install? Thank you.
Mailcow switched to PHP 8 a while ago which is not supported by Roundcube 1.4.x, you must use 1.5 RC.
If you already have Roundcube 1.5, it is probably another issue.
That was the issue, thanks.