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<
There is no estimated release date. Follow us on social media to stay up to date!
Before creating a support ticket about your game version not being supported in TruckersMP
SCS released updates for ATS & ETS2. We do not support the latest version of American Truck Simulator nor Euro Truck Simulator 2 yet. You need to wait until we release a game update in order to play the newest version of ATS and ETS2 in our Multiplayer.
Downgrading to an older version is possible. More information can be found here