Steam Mastery Challenge Problem

Good morning,
I am encountering a problem regarding the "Mastery challenges" on the LGV Méditerranée.

Indeed, I have fulfilled one of the conditions of tier 2, namely finishing at least 3 scenarios and yet it remains stuck at 0.

To be sure, I finished the 5 proposed scenarios and yet I am still marked as 0.

Maybe I missed something?

I play on Steam, my game is up to date.

 

Read the threads on broken trophies / masteries. It's a TSW thing, many are broken.

 

If the developers don't care, why don't they unlock them for everyone?
Using to pay for half-finished games where players are mocked like cash cows

 

You must be new here.

 

I have the same problem on LGV
But DTG doesn't care at all.
You paid and you bother with their problems.