Sometimes I can start my projects without a problem, but often (only when Massive X is used in projects) projects don't start and just keeps loading like this forever.
Do you have the latest Massive X update? or you are running an old version?
Yes running everything on latest versions
Sorry to jump so late in this thread, currently checling old posts. You could try these steps: Some Presets are Missing in MASSIVE X Resetting the database could help.