EasyDiscuss Groups App does not work correctly

Hi,

I have just bought and installed the EasyDiscuss Group App. But when I try to open it in a group, I am getting this message only: The view groups does not exist for this app.

I have read this threat (https://stackideas.com/forums/the-view-groups-does-not-exist-for-this-app) but this does not help. Is there any new fix for this issue?

Thanks
Uwe