I get this message after installing pyrevit and opening Revit2021. However, in version 2023 it opens normally. I want a solution for version 2021, since in my work we use this version.
Your question is more suited for the gthub repo, similar issues related to
- incompatibilities with installed addins (solved by deactivating all the addins one by one until finding the incompatible one thanks to diroots app manager, or uninstalling pyRevit)
- wrong or incompatible engine ( set up a different engine through CLI or the Settings in the working UI)
- old installs conflitcs
- use of firewalls/antivirus such as Sentinel (Removing restrictions to the %appdata% folder)
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