Sorry to be a pest…
When I load up Grasshopper I’m getting this first error. If I run an element ‘Import3DM’ and choose I file, I get the second message repetitively. (I’ve checked ‘don’t show again’ so that is gone, but I’m sure the underlying issue is still there)
Apart from vanilla grasshopper, I have installed Human UI and Opennest. Is it likely to be one of those?