"Investigating - Microsoft’s latest update (Windows 10, 1903 update 05/20) broke their ability to communicate with our IPP printers. If you used our Updox IPP Printer, it is based on Microsoft IPP technology and is now failing as a result of the update. "

http://status.updox.com/

The site above goes on to suggest downloads and fixes.

It also has alerts about other updox problems.