We are aware that the ManiaPlanet Master Server is down, we are working to bring it back as soon as possible.
In the meantime, you're still able to play on TrackMania² with the "Play Local" mode and you're still able to use the Track Editor and the MediaTracker if you've been connected at least one time to the Master Server before.
This post will be updated as soon as i have new informations.
Sorry for the disagrement.
[UPDATE] The Master Server has crashed and at the same we are going trough a power outage at Nadeo. This combination of circumstances prevents from bringing back the Master Server at this moment.