I was playing an alt and had completed the part of the Veiled Heritance quest line where you go to the Island for training and then return and talk to Razum-Dar and the Queen.
When i logged in tonight I was back in disguise and had the part of the quest where you have to enter the vault on the island was in my quest tracker. I had heard about some people having rollbacks, so I headed back over to finish it up (again). However, when i got to the end of the vault, the quest was suddenly removed from my tracker. When i opened my journal i had no main quests, or even side quests. I only had 2 guild quests and 2 Cyrodiil quests.
According to the map, the objective to "help Razum-Dar defeat the Veiled Heritance at Skywatch" has not been completed, but I have no quests for it, and no way of picking it up. I went all through Skywatch, but there is no one to give me a quest. Raz is not there, and the queen is not there. I have no idea how many Auridon quests I had in my journal, but they are all gone now, and i can't progress with the main story line.