Chrome Version: 67.0.3366.3
OS: 10483.0.0

What steps will reproduce the problem?
(1) Open printer settings
(2) Click add printer
(3) Choose a printer that should be autoconf

What is the expected result?
Printer sets up automatically

What happens instead?
Printer setup fails.  Printer setup fails because the printer returns 404 for the bad uri ipp://printerip//ipp/print