Problem changing group admin


we run in to a issue after our previous admin left.

He had created user groups in the Seafile server and his account does not exist any more.

It seems that even if we have several people with admin access to seafile, we cannot change the owner of the user groups or add or remove users ; we’ll just get an “internal server error” . Is there a way to force changing a group owner or do we need to create and populate new groups?

E: running Server version 7.0.4


No reply here, so what would be the next support step?