Cubase corrupt file - Project 1.x message

Does anyone know if there is a solution to this error message?

Screen Shot 2019-12-30 at 3.58.17 PM.png

I know there were Windows based threads on this previously, but I can’t find a solution. File was created in 10.5.

Any help gratefully received


Try creating a new empty 10.5 Project and then Import all the Tracks from the problem Project