I am having a strange error and cannot find any info on it

I am having this error in all versions of Revit for pyRevit 6.5.3.26176. It is keeping pyRevit from showing in any of my Revit ribbons. Any ideas?

Is this a .net issue you think?

Update: I am NOT seeing this in Revit 2026 and pyRevit shows in the ribbon. Revit 2023 and 2024, the error pops up and no pyRevit ribbon tab. FYI

Try
pyRevit attach master default --installed
In the command line