désoler trop lâche pour retranscrir mais voila : OK I came back here to announce that I managed to solve the problem!
after completely reinstalling the game which took A LOT of time the game still didn't work! I was desperate and I really didn't want to reinstall my windows I tried one last thing and shut down completely my IObit Maleware Fighter (previously I disabled all the shields) guess what!? apparently this stupid program blocked somehow the client from loading!
I hope this will help someone in the future if he will ever run into the same problem.