Why can't I select a vendor on a bill?
The bill form lists active approved vendors and its search needs vendor viewing access.
Bill choices include active vendors marked approved. A newly created vendor can wait for approval when a vendor workflow applies. Wait for that review before selecting it. You also need View vendors for the search and Create bills for the new bill; quick adding a vendor needs Create vendors. Check the existing vendor before creating another copy. See Add or edit a vendor and Enter a bill.