Why Can't my Manger assign the checklist to another person?

Summary:

We are trying to use the Observation checklist, and we are checking the box that allows the manager to assign the checklist to another person and they are getting an error?

Content (required):

Observation Checklist

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

Fusion

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