I get the following error, I only run one copy at time, tried rebooting and my internet is working fine.
Failed to initialize UDP network connectivity. (RAKNET)
This is almost certainly because you are already running another copy of X-Plane on the same computer.
Another possibility is that you turned off IPv6 support in your operating system. X-Plane requires at least link-local IPv6 connectivity.
Be sure that IPv6 support is on, and restart your computer to be sure that no other instance of X-Plane is running in the background. If it still fails, please check the Log.txt file for entries of type E/NET and W/NET for details.
(inet_main.cpp:262)
Not sure on how to add my log.txt file here ?