I translate everything with google because I can not speak English.
Long ago, when my friend and I bought Trackmania 2, I was able to play with my friend my own created and also downloaded tracks without problems.
Now we wanted to play again Trackmania 2 (there were updates, which we have installed of course), but all our tracks, do not work. An error is always displayed.
Now I have the game completely reinstalled and a simple route created (start, checkpoint and goal).
If I want to start this route in a local network, also comes an error. To make it clear, I have created a video for this.
Video:
Can you help me? Because this game has become completely worthless for us and all this just because of the updates

So after a help from another, I have taken the data from the following link: viewtopic.php?f=8&t=41242&p=286813
With these data, I can play all tracks, but unfortunately not use the updates. Can the updates be reworked to prevent this error from occurring? By the way, the error also occurs with my friend.