Hey, this was probably already mentioned before but the interior door in old orsinium is bugged, I am unable to enter even after I completed the quest there. This is on Xbox NA.
We are aware of an issue where players are unable to access Old Orsinium if they are not currently on or have already completed the quest "Flames of Forge and Fallen". This issue will be resolved in a future update and you will be able to reenter it. This thread will now be closed since this is a known issue that will be patched.