Hi,
Is there a way to allow Rhino 8 in the dropdown for Revit 2026? I can only select the WIP Rhino 9.
What Rhino & RiR version are you running?
Running in 21 & 25 is odd, but probably the best place to start troubleshooting would be to start grasshopper via the command line with GrasshopperLoadOneByOne and say no to 3rd party plugins.
It shows up after updating to 8.35. Thanks!