Select one of the users for which the issue happens and reset the link.

1. Log on as Customer Support Responsibility

2. Select Resources > Maintain Resources

3. Open the Resource Form

4. Find the Resource using the name and category

5. Navigate to Resource Details

6. Locate the field called User Name.
If there are no values in that field click the LOV, select the user name and save the record.
If there is a user name, clear the field and save the record.
Then click the LOV again and select the correct user name.

7. Log out of the application and log back in as the user that was just set up.

8. Test again and replicate as necessary to other environments.