Syd/Hotkeys, so sorry that you guys missed the race. I believe this problem is only affecting some people and it's due to Altbeirbude changing their server or something. Some folk don't have to do anything and they join, others have to use a fix. I'll have a look at GTLDK for a fix, please watch this space.
EDIT: Make a backup of your existing files then try this
The Altbierbuden-Lobby has switched to a new server.
So you have to change your LOCAL_IP_LOBBY.txt in your main GTL folder.
remove the line
gtl-lobby.bierbuden.de
replace with
91.121.7.48
restart the game, you should then arrive at the correct lobby
Steve, welcome back. Remember it's like riding a bike