Answer
What you're actually looking for is a Report Formatter, configured under Setup IFS Connect in the navigator — not a 'PrintAgent' Application Server Task job type, which isn't how Print Agent setup works. Print Agent itself isn't mandatory for basic printing to a network printer (which explains why printing has worked without it before); it becomes necessary specifically for scenarios like ZPL label printing that need the Print Agent's own spooler/socket handling. When you do need it, install Print Agent on a dedicated utility server with network access to the physical printers — not on the application server itself or an end-user client machine.