Not able to access game progression in "Atlantis" DLC
I purchased the "Fate of Atlantis" DLC yesterday. I played for couple hours in the Elysium location. Then I wanted to go to the base game so I went to the "portal" and selected "Greece" and was back in the base game and doing missions there. Next day, I wanted to access "Atlantis". But in my quest list, there was NO quest related to Atlantis. (In my inventory, I can still see the gear I picked up in Atlantis) . I fast-travelled to the "Gateway to Lost Atlantis" location on Thera island. But after reaching there, I don't see any way to go to Atlantis. If I go to the main menu , select "Fate of Atlantis: and then I select the "Legitimate Progression",I face the same issue. Is there something that I am missing? Or have I completely lost the game progression in Atlantis?