I've chosen a request type: Service Request with Approvals. The form works fine for some people. But others who try it cannot enter an approver. The "Approvers" field never auto-fills a name. It also never pops up to say "please enter one character or more". And no matter how they type in a name of someone who is in the system (email address, short name, firstname last name, etc) it never works. Not any combination. They cannot submit a helpdesk ticket because I made the field mandatory and they can't get past that field.
Other people in my company have no issues. The Approvers field works fine.
Why is it OK for some but not ok for everyone?