To resolve this do the following
  1. Go to File Maintenance > Profile > Profile Code Maintenance > Affiliation 
  2. Double click one of the Affiliation codes you are trying to add to a Profile 
  3. Ensure that there are no special characters or spaces in the Title, or Description, of the Affiliation Code 
  4. Make sure the Code is marked as Active 
If the issue continues then you would need to check that your user has sufficient user rights to add Affiliations to a Profile