Minecraft 1.13.2 Lan party is not displayed?

Have a problem my girlfriend and I wanted to play minecraft together (same network) on the version 1.13.2 are synonymous both on the 1.13.2 has always worked out but now the lan party is no longer displayed and ip is not synonymous

Sure you're in the same network?

(Ipconfig)

Both have the same version?

When opening the world also the port is displayed with which you should connect.

Is Java / Minecraft enabled in the firewall (PC)?

Put on a server and joint over the Stadnard port on the IP.