A friend of mine has tried to run their game today, but it doesn't seem to be working. First, their game opened with a black screen. After that, they asked for my help and sent me the file. I wasn't able to open it. Construct gave the error message "Failed to open project. Check it is a valid Construct 3 single-file (.c3p) project."
After a bit of troubleshooting, my friend encountered the same issue. They still had their original file open, but that wouldn't load their game layout.
I suspect their file might have corrupted, but according to them it was working just fine an hour ago. I've tried copying the file and opening that as a .zip, and I'm able to see everything just fine there, but it still won't open.
Any ideas?