Default [Q] ViperS 5.1.0 - Gallery crashes

Hi, I have this rom working without problems for a few weeks now on my XE. But since 2 days I'm experiencing problems with the gallery app. I can open it, but when selecting a map, the app crashes. Sometimes it just says 'gallery stopped working', sometimes it says something like 'google play services stopped'. When I try to check out a just shot photo (from within the camera app), the app immediately crashes...

Can't find anything about it, somebody got a clue?