Images cant be edited or exported

I have the ipad pro 10,5, this happens now and then, earlier the only solution was to unistall the app and then reinstall once again on the ipad.

But this doesnt help anymore. Problem is:

Some photos in my catalogue CAN NOT be edited and can not be exported either, ”error loading file”... This happens to photos that has been in the same place a long time, and has been edited before without any problems at all. They are all in raw format.. I can view them only as the smart previews but they cant be edited or exported no matter what i do..