Cumulus Support

OK.

After upgrading mono to 6.12.0 Preview (6.12.0.157) CumulusMX seems to be up and running.

https://www.mono-project.com/download/p ... n-raspbian

As a test for the original image, I uninstall mono-complete and then install it again. Some parts of mono are compiled at install time so may be CPU version dependent.