AADSTS50105 The signed in user is not assigned to a role for the application

The Azure SSO application created for Veritas Alta Archiving is not assigned to the user who is attempting to login.
1. Login to the Azure AD Admin Center using Microsoft Admin Center.
2. Navigate to Enterprise Applications and lookup the application created for Veritas Alta Archiving.
3. Click on Users and Groups > Add User.
4. Add the user account getting this error and save the configuration.