Maintenance for the week of February 24:
• PC/Mac: No maintenance – February 24
The issues related to logging in to the megaservers have been resolved at this time. If you continue to experience difficulties at login, please restart your client. Thank you for your patience!
How exactly is it blocked ?
In order to enter cyrodiil you need to press L, switch to campaigns tab, choose a campaign and mark it either as home or guest and then enter, which will teleport you into the cyrodiil.