I have the same problem
I’m trying to get Syphon Processing working with quil. Using the latest release from Syphon Server, knowing that the latest quil uses processing 3 and figuring this could be related, I downgraded to the latest processing syphon v2 release and downgraded quil to 2.1.0 and it magically works.
So upgrading to latest quil is impossible
upgrading to latest processing syphon as well
more specifically I think it has to be related to
OpenGL error 1282 at top endDraw(): invalid operation
could it be some dependency is not loaded?