Windows 1.6.3 update broke co op

[Mausu]

Been playing in a world with 2 friends, non modded
everything was fine, and then after the 1.6.3 update, we cant connect too eachother at all now
keep getting the "Connection Failed" and we tryed new world, and all 3 of us being the host, nothing worked.

hope it can get fixed, so we can play together again.

 

[QCLasky]

Been playing in a world with 2 friends, non modded
everything was fine, and then after the 1.6.3 update, we cant connect too eachother at all now
keep getting the "Connection Failed" and we tryed new world, and all 3 of us being the host, nothing worked.

hope it can get fixed, so we can play together again.

Try to disable firewall first