Hi guys, I'm having trouble opening an existing .c2p project.

I'm always getting this Error:

https://i.imgur.com/FX52utc.png

Other Projects work just fine.

I've got an obj model imported and a couple of fixtures set up, but I don't want to set it up again.

It worked fine just a week ago...

I haven't saved it to any cloud storage, just locally. Can anyone help?