Can't add Google account after phone reset

I have a Leagoo Lead 3 running Android 4.4 KitKat. After factory resetting it, I'm no able to add my Google account. The error I receive is > Couldn't sign in > There was a problem communicating with Google servers. Try again later. Googling it, I find that the hosts file in /system/etc needed to be modified to comment out xxx.xxx.xxx.xxx android.clients.Google.com, but I don't have this line. Also, I checked HTTP traffic with Fiddler and I just have this : > "200 HTTP Tunnel to 173.194.40.142:443" with body 0 It seems to be a good Google IP. I don't know what to check now. Any help will be appreciated.