Cubase 11 Elements don`t recognize own files

Trying to finish yesterday work, could not open the file. Tried to open from Open File dialog - the file of a song is not visible for program.
Who encountered and solved such a problem, please help


Can you open the project from Finder/File Explorer? How does the file look like there? Is there the *.cpr extension available?

It wrote that not. But actually now all works after restarting a computer. Thank you!