Steam API is currently reporting outdated information to our servers, therefore some users can not register in TruckersMP. As the issue is out of our reach, unfortunately, there is nothing we can do to resolve the problem.
If you experience that, please try again later. Apologies for the inconvenience.
GTR team's notice about the holiday during the Spring Festival:
15 Jan 06:33 UTC | [G.T.R] I 002 I Driver