Salut essaye ça, ça marche pour moi :
After testing this a few times this is what works for me.
When I receive the Error Code [2-0x0000c015] I verify integrity of game files and then open the Command Prompt.
To access this you do Windows Key+R then type CMD
When the Command Prompt opens, type into it- ipconfig/flushdns
Do this multiple times (I did it 5-10 times)
When done flushing your DNS then restart your router and then launch your game and that should do it.
Source : https://forums.ubi.com/showthread.php/1802025-Error-Code-2-0x0000c015-(Lost-connection-to-match-Forums