how do you fix this contingent worker error?

Summary: When our line managers try to Add a Contingent Worker they receive an error that says "Forbidden" "You must provide a value for the Personid attribute"

Content (please ensure you mask any confidential information): This is the error received.

Version (include the version you are using, if applicable): 25B

Code Snippet (add any code snippets that support your topic, if applicable):