'Failed to open' mlt file need help urgently for history project

[Hudson555x]

The project you uploaded has been corrupted. Not fixable.
You’ll have to revert back to your last saved version, if you have one.

This is what your file looks like with Notepad ++:

"Failed to open" error message after updating

This file is corrupt and it has nothing to do with the upgrade. The only way to recover is if you have a backup. You can read more about it by searching here on “NUL” or the web in general on “windows file null character” to find something like this. As far as we can tell this is not due to a bug in Shotcut but something in the way Windows does caching or hardware. Shotcut first writes a temporary file, verifies it valid XML, and then renames it to the name you provided.