Revit 2026 Pyrevit install problem

Hi Guys,
Getting the attached issue in Revit 2026 (PR for Revit 2025 working fine)
Latest Pyrevit 2026 build
Latest Revit 2026 update
Disabled antivirus
Uninstalled & reinstalled Pyrevit.

Any input appreciated.

H

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any clue? I have encountered exact same error message

no double post please…
an issue is enough.
for future reference:

pretty sure this will solve your issue Error dynamically compiling pyRevit runtime

99% of the cases, the issue comes from previous installation not being uninstalled properly before installing the latest version