I’ve just tried to open Grasshopper and I get this breakpoint error, and many others:
and when it eventually opens there arent any components in the ribbons:
Is anyone able to help? I don’t have any idea where to start to solve this 
Thank you!
This could be an issue caused by conflicts with 3rd plugin. There is a way to troubleshoot a Grasshopper plugin conflict to start Grasshopper from the Rhino command line with command GrasshopperLoadOneByOne and say No to all 3rd party Grasshopper plugins.