I was checking ports and by default ports 80, 8080, and 443 are open, no problem.

However in the sticky post they say to open up ports 55296～55551 in both UDP and TCP (please correct me if I'm wrong, I am by no means a network engineer). Opening up that range of ports however did NOT stop me from disconnecting. After going through different ranges of ports, I have found out that the range 54994-55551 was the acceptable range for me to stop disconnecting and for my start button to light up again instead of staying gray!

Let me know if maybe I have been doing something incorrectly for the original suggested range to work, otherwise this is what worked for me (down to the 4, going to 54995 caused me to still disconnect).

Enjoy!