Major problem - course crash!

Hi!

Trying again to post as is didn't seem to stick last time.


I have a course which I'm developing and now out of nowhere the course won't start. It crashes as soon as I try to open it.


I use Dropbox and have tried to revert to older versions but no luck.


Any suggestions what to do or leads about what can have gone wrong would be much appreciated!


Best regards / Kent

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