World of Trucks not synchronizing
Solution 1:
First things first: it was synchronizing when it needed to. It simply didn't need to, yet. It only synchronizes World of Trucks delivery contracts ("External contracts").
It's not mentioned anywhere in the challenge, but only WoT deliveries are counted. It is only vaguely implied.
Complete 10 total deliveries of any cargo between Germany and 10 other different countries in Euro Truck Simulator 2. Each delivery must be at least 300km.
This is also a community event. The entire community is required to deliver 15.000.000 tons of cargo in total to Germany from any other country or vice versa. There is no distance limit for the community deliveries.
Note how they speak about the community? That's the WoT community. It's a WoT event which only counts WoT contracts. Quick jobs and other jobs do not count.
Get your own truck, start trucking external jobs, and all of a sudden you're making progress!