user doesn't exist error when editing Domain
 

I have a weird issue when editing one Domain it says "user doesn't exist".
The owner also isn't listed under users. But the user exists in /etc/passwd and in /usr/local/ispmgr/etc/ispmgr.conf

In /var/www/$user/data there is a folder .filemgr-tmp, but tmp and mod-tmp are missing.

User can login to ISPManager, but has only Tools -> Filemanager
User can also login to FTP

User exists In /etc/shadow?

Yes user exists in /etc/shadow and /etc/passwd

And what in the ispmgr.log ?