OneNote Microsoft does not work on Ipad

Hey,

I've got an Ipad for work. Currently I'm testing a lot of microsoft apps. Unfortunatly I seem to have problems when starting OneNote.

It was working just fine for 2 weeks and all of a sudden it stopt working. When I try to open the app I get the purple window, sometimes even the first page of one of my notebooks. Can't scroll however. Then it just shuts down.

I tried removing it (also via 'managing ussage' in settings). I reset my Ipad a couple off times (with on/off switch but also with homescreen & on/off switch).

Please help...