It could be due to Package version and Studio version mismatch. Try following solutions.
Clear Package Caches:
- Open
%userprofile%in your system. - Navigate to the
.nuget/packagesfolder and delete all contents. - Reopen UiPath Studio and restore the project dependencies.
Reinstall UiPath Studio:
Reinstalling UiPath Studio can help replace any corrupt or missing files that might be causing the issue. Ensure you back up your current projects before reinstalling.