For some reason, I can't connect to the master server anymore. I was able to when I initially installed this game on my computer. Then, I wanted to play with a friend. I had to set up port forwarding in order for us to play. I did, and we were able to play successfully. The very next day, when I started the game, I had the following error pop up.
There was absolutely no changes I made to the network after we played successfully last night. I attempted to turn off the fire wall, check my network settings, check my router settings (the port forwarding is still there), and