The launcher just says it failed to connect and that it’s trying to reconnect.
I don’t know what I shall do.
Are you still having issues? It may have just been an intermittent outage (on either end)
I’m still having issues, it sucks I was really looking forward to play with the engine again after a long break 
Well it doesn’t seem to affect me, so its probably your ISP/Router/Firewall.
You can launch the editor without the launcher (however you wont be able to download stuff from marketplace and such)
[Install Location]\Epic Games\4.10\Engine\Binaries\Win64\UE4Editor.exe
So for me it is located in
D:\Program Files (x86)\Epic Games\4.10\Engine\Binaries\Win64\UE4Editor.exe
-http=wininet command in target of epic launcher seems to solve it