So there is something strange going on. I bought a new router and it was already configured(with passwords etc.). When I try to open lan, and connect with another computer (we are connected on the same Wifi) it doesnt detect a LAN server! Thats a bit strange because past week i played with two computers on the other router and it work perfectly.
It first image you can see that through ipconfig I was able to added a server (192.168…..:xxxx).
But when I try to connect, this happens:
(of course I tried to relaunch the minecraft)
I dont know where the problems is. I changed firewall settings many times(read from this forum that this can help), nothing changed. PS: i prefer not to use HAMACHI
Something similar : Failed to Login : Invalid session (Try restarting your game) Minecraft Error