Hi Alianora
please remind me what is the 13th quest of the Tutorial ?
and we shall see if something is missing
for me, it says to open the strategic map
http://prntscr.com/7jkustif after clicking on the map icon, you still can not complete the quest, I'd advise you to log off the game, then log in again and click on the map icon, then leave it for a short moment (30s-60s) for the quest to be updated
it's also a chain quest that leads to spying, and then attacking
have fun,