.mkv file didn't work when downloading video file to edit from obs, encoded in software x264. I tried .mp4 but that didn't work either. I would like a list of things to try. Error is below.

Cannot open the project file, error occurred while parsing element (line 1, col 1)
Do you want to open a backup file?

This has been fixed, I figured it out

Can you share how to fix this problem, please help me in detail. kinemaster pro apps at techbigs have helped me