Game progress stuck, I cannot level up.

For some reason I do quests, I finish them, I get the gold but since yesterday I got stuck. It is not leveling up just after getting any item to cash in like normal. To be clear, I mean the trading company progression system, I am 14, 15 and 8 in each one of the three companies. I haven't being able to level up today despite completing quests.
I guess I will need to wait till the game stabilize, I understand they have received an insane amount of players.
Anyone else?
Thanks!