AnthemScore 4.12 and Musescore 3.6.2 on Ubuntu 20.04
When AnthemScore runs it creates a score in /tmp/Anthemxxxxx/somefile.xml
It then calls Musescore and passes that filename to open.
Musescore is generating a Load Error when presented with that filename on the call from AnthemScore.
If one attempts to manually navigate to the same file from within Musescore, nothing beneath the top level /tmp directory is visible (directories or files). The permissions on the /tmp directory are wide open.
Musescore is installed as a snap on the machine in question.
With previous installations of Musescore (non snap, if relevant) this did not occur; the hand off from AnthemScore was successful.
Any insights are welcome.