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
As community based auto club in the Great Lake region, High G Racing is dedicated to provide a safe, friendly and enjoyable environment for auto enthusiast since 2014.
We have successfully hosted many HPDE (High Performance Driving Education) event in the past two years; all those events had a very good feedback from customers and our active club members. Currently we have nearly 200 active members in the area of Michigan, Ohio, Indiana, Illinois, Wisconsin and Pennsylvania and we are still growing strongly.