Unable to load Pyrevit after custom extension

Tools
1

I have tried to create an extension for pyrevit using microsoft copilot. It is working well in Revit 2024 but when i started my revit 2025 and 2026 it is unable to load pyrevit. I am not sure if this is an issue with extension or is it something related to company security policy. I tried uninistalling, deleting the appdata folder and reinstalling pyrevit but it didn’t fix the issue.

First image show error i got after running custom extension

Screenshot 2026-10-23 104802
Screenshot 2026-10-23 1048021522×1377 201 KB

Second image shows error after different version of pyrevit was installed by IT team

image
image1920×1080 486 KB

Would be really thankfull as i need pyrevit for my custom task. I was creating script in claud and using it through pyrevit. This one has created a setback for me.

2

You installed the admin version of pyrevit, depending on company policy settings and whatnot this can lead to issues, as it is trying to access the ProgramData folder.
I recommend using the non-admin version, and do a clean install. Remove any leftovers in ProgramData and AppData to make sure no conflicts arise.

Also always provide the

pyrevit env

output, that makes helping eaiser