Truck Simulator Ultimate Career and Online Modes Not Working

I have been experiencing a serious gameplay problem in Truck Simulator Ultimate on my Android device. For some time now, missions in the game do not load at all, and because of this I am unable to play in either Career mode or Online mode. This issue happens every time I try to play, so I can no longer use the main features of the game. I have already tried general solutions such as updating the game and other basic fixes, but the problem still continues in the same way and nothing has changed. I request that this bug, which prevents missions from loading and blocks access to Career and Online modes, be urgently investigated and fixed so that I can play the game properly again.