Error message after "Fragehistorie"
As we already talked in Skype today, this error message occured after I clicked on Fragehistorie as a cooperative partner. Logically, no popup-window with the Fragehistorie opened. Right now, cooperative partner shouldn't be allowed to see the Fragehistorie, but then there shouldn't be a Button to click on for that user role. @chalupja is about to talk about this issue with Manuela: either the cooperative partner should be able to see the Fragehistorie, then the button is okay, but the function behind must be "repaired" - or - the cooppart should still not see the Fragehistorie, then the button has to be deleted.