Revit 2021 System.ArgumentException Error

[rick.vandelagemaat]

Fortunately it has nothing to do with PyRevit

Please take a look at this thread:

If you cannot launch Dynamo in Revit 2021 with NullReference IsOptedIn error

We have been getting more reports of an issue affecting Dynamo / Autodesk analytics. There are a few analytics launch issues floating around the forum so please check the stack trace here to ensure you’ve seen this particular stack trace before trying this workaround. [2023-03-07_06-41-51] We believe the issue is with an update to ADP - Autodesk’s analytics component that Dynamo uses. This can be installed globally automatically or by other applications - a particular version 4.4.0 causes is…