Did you manually place ghas that you downloaded in the the “program files/Rhino6/Plug-ins/GrassHopper/Components” directory? I wouldn’t recommend that as that specific directory is really for the components that ship with the installed copy of Rhino.
I would close Rhino and move the components with dates that aren’t
23.04.2020 into the libraries folder. That probably won’t fix the issue, but it should help get us closer to a clean system that we can figure out if a gha is at fault.