Question:

Why does a Workflow Owner receive a notification stating an Internal User has a license violation? 

Answer:

This issue occurs after an Internal User provides an eSignature but does not have the e-signature permission. To provide the user the permission an Admin user (with System Administrator or Vault Owner privileges) needs to do the following:

1. Navigate to Admin --> Users & Groups --> Permission Sets --> [Group] --> Application.
2. Enable eSignature under the Workflow area. 
   
   

Related Documentation:

Vault Permissions Documentation: About Permission Sets