Pour ceux qui voient écrit "echec connexion" lors de la page chargement pour jouer, la réponse officiel est:

If you click on Join from the main menu, do you get an error about network initialization?
This is a known issue, which can be caused by a too strict firewall, network drivers or other problems with a network card. The next update will include a change for single player games (the client/server connection will not use sockets) to avoid this problem.

In this case, it should help to reset your network adapter:
- click Start (or Search in Win 10), type cmd into the search box, right click Command Prompt and select run as administrator.
- type the following command and hit Enter
netsh winsock reset
- when that is done, there should be a message 'Winsock reset completed successfully'
- type exit and hit Enter, then reboot your computer.
For more details, see:
https://iihelp.iinet.net.au/Resetting_Network_Adapter_(Winsock_Reset)

Pour ma part cela marche . bon jeu