Hello Brandon and Anita,
i've got in contact with Meraki Support, and all they said is that it's a "known issue" but so far no solution.
Now the issue is only on some Mac computers, all updated at the last MacOS version.
unfortunately, i tried to push it as custom app but it won't work, neither installing it manually as the error reported would be "Your organization installs it automatically and there's no need to install the agent".
My only idea now is to unenroll the computers and re-enroll them manually, but that's about 40 computers and it's going to take a while...
Best
Valerio