I’m currently using Ultimaker Cura 5.8.1 version and couldn’t connect my printer to Cura. I tried connecting via IP address, but Cura couldn’t detect my printer even though it was connected to the wi-fi. Then I tried to connect by selecting non-networked printers’ section, which didn’t work either as I couldn’t find my printer model there.
Solved.
All I had to do is installing recent version of Cura to be able to add my printer in the non-networked printers section. Apparently, adding printers via network is just available for Cura printers.