Can't save file

Hi - I created a musescore file to be used as a template by my students. I share it with them so they each download a copy. They can open their copy and make changes but they can't then save the file. I've added this file below but the same issue has occurred with other musescore files an only since upgrading to the new version Can you help?
OS: macOS 13.6, Arch.: arm64, MuseScore Studio version (64-bit): 4.4.2-242570931, revision: 3130f97