sry but i do not think its the firewall ive checked and this problem happened to me and 4 other of my friends we could only play solo while multiplayer was in red font and unclickable
Hey man, thank you so much. That is why feedback is so important. It was working on my local computer, so I never saw that problem. That explain some traffic information I was having on the servers.
There is a new version released, let me know if it fixes the problem for you now.