Hello there @kamil96500,
Firstly, please ensure that you are using the Bolloré BlueBus before attempting to start a route/line.
If the issue still persists, it is also worth noting that along with the updated client, we have also updated some of the line files, which you may need to replace manually. In order to do this, you will need to do the following:
Join our Discord
Navigate to the Routes / Lines category
Go to the TruckersMP post/thread
Download the TruckersMP 1.50+ .zip file
In that .zip file you will find a folder named TruckersMP 1.50+. Simply place this folder into Documents/DBus Client/maps and you should be good to go!
If you still encounter any issues, please let me know!
Kind regards,
SvartWolf
DBus World Management