How to test a fast formula? It is not possible to select a collaborator's assignment, it is blank.

Summary:

We need to test the validation of the fast formulas, but the assignment field is blank.

Content (please ensure you mask any confidential information):

Field assignment is blank, to validate the fast formula, I cannot select it, even though the employee is eligible for the plan and the plan is started.

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

24B (11.13.24.04.0)

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