Hi Matteo, thank you for your help!
I’ve tried killing all plugins. I think it is pretty clean (see image below), but I receive the same error. Any other thoughts on what I could try?
EDIT:
It could be coincidence, but it appears to be that starting Speckle 1.0 in Rhino (before starting GH) solved this issue as well (just like it solved the issue described in this topic: Schema Builder component unable to set baseline - #13 by JdB_RHDHV)
