Wizards of DB folder I call for your aid!

What I’m trying to do

I am trying to create group filters with the database folder plug-in, but even though it works for some databases it does not for others - even though all settings are the same and I have quadruple checked that I have written everything correct.

When I add the group filter nothing happens (even with just one group). On the other hand, if I try to add a normal filter with the same settings it does work.

Does anyone have a solution or have any other of you had the same trouble?