I have been using 2.4 for a while and AJAX suddenly stopped working on FF and Chrome. If I try to move something around on the course page it just jumps to a white screen with the drag handle in the top corner. I can't do any drag or drop questions etc. When I tried it in Explorer it still works fine.
I checked to see AJAX is enabled and it is. The last thing that happened before this was that I created a new course and enrolled myself as a teacher. I got this error message which I can't seem to recall what it said and then AJAX stopped on FF and Chrome.
How do I proceed?
All help would be greatly appreciated.