COOP Bugged?

[ChucK---]

Anyone else having trouble joining a friend?

[Salty_Johnson]

Player hosting the world loads up. Alt+Tab out and use steam to invite the friend to the game. Works fine for me.

[Kainos]

Be sure that both you and your friend have the game added to firewall exceptions and then you both may have to restart the game and/or Steam. Sometimes even restarting your pc helps.