Problems to play with my friend. (It is not a dedicated server)

[Zhekar]

Hi all. It is my first publication and you can excuse my bad English. I created my account for the forum just to solve this problem (Note my despair xd)

I am having trouble playing with my GF. Every time we are connected to the same network, the game tells me: "The server is on a different server than you. Please check that your game version is up-to-date.", A problem that does not occur when we are each playing in their respective home.

We tried uninstalling the game and installing on both PCs, running everything as administrator and many other options.

I make this request for help since most of the questions in the forum are about dedicated servers.

If you could solve this problem, it would be of great help.

From already thank you very much.