TruckersMP does not support the latest game version of Euro Truck Simulator 2 or American Truck Simulator yet.
Check out the following guide on how to downgrade so you can keep playing on multiplayer:
How to downgrade
* * After TMP announced the establishment of the Virtual Freight Company (VTC), we learned about it for the first time and created it on July 14 at 11: 00 UTC (19: 00 Beijing time). We have successfully registered our virtual freight company GTR Vocational Training Center. **
| 20 Jul 2019 10:13 UTC | [GTR - 001] ED Zeher
New Community Activity-Operation Genoa Bridge.
03 Jun 04:15 UTC | [GTR - 002] Driver