Hi Tenno,
We're aware of reports of this week's Elite Sanctuary Onslaught rotation causing players to not load into the mission. We're currently investigating, but ask players to avoid ESO for the meantime until this can be fixed.
Thank you for your patience.
UPDATE: After looking into this more, our recommendation is to avoid ESO until tomorrow when we can revisit this further. Unfortunately, as it is a holiday Monday in Canada, we are limited with our options today. Thank you again, Tenno, and apologies for the inconvenience.
UPDATE 2: Our team are wizards and managed to change this week's rotation. Issue is resolved! If are still having issues loading into the new ESO rotation, please relog.