This is from the X-box forums, a player there got a response.
Greetings,
This is Paul from The Elder Scrolls Online: Tamriel Unlimited Support Team.
The connectivityy error you've described is a known issue right now and we're working on resolving this as soon as possible! We're truly sorry that this has been of hindrance to you and hope to iron it out very soon.
Thank you for being so patient with us while we deal with matters like this and remember if you have any other issues please feel free to get in contact with us again.