All Pictures disappeared from my campaign

I was creating a charakter as gamemaster and adding a lot of text to the Bio & Information section. Suddenly the image of the charakter which I uploaded disappeared, instead there only was a small icon. I tried deleting and re-uploading the picture, but again it only showed the small icon. I logged out from the game and logged in again. Suddenly all pictures which I uploaded for the campaign were gone, same as the maps. Also the small X symbol to close windows is gone. Even after logging out and in several time the error persists. What should I do? Is my campaign broken now?

Are you deleting images from the "art library" after you've used them as a map or as a token? They need to remain in the art library for them to be used in your campaign.

I did not delete anything. However, after a computer reboot most of the pictures came back. Just a few remained broken. Strange... Thank you for your reply!