Hello
Try to connect to the server using mobile data on your phone.
Probably, there is a problem with your internet connection or your modem. Turn off your modem and try turning it back on after 5 minutes.
Please try the following steps -
Press the Windows Key + R (Win+R) on your keyboard
Enter "%programdata%" and press Enter (without the quotes)
Find the folder "TruckersMP" and delete that folder.
Navigate to C:\Program Files\ and delete the folder named "TruckersMP Launcher"
Go to our website and re-download and install the Launcher with admin