i cant progress this mission at all due to getting stuck in conversation loading for ever. i googled this issue and found a 2 year old post with same issue and they suggested that having Theron Shan as an active companion was causing the bug, so dismissing him would solve it.
but there in lies the problem, i dont have him as an active follower, in the matter of fact i CANT as he is locked as a contact. but i still tried using diffrent companions dismissing them resetting the chapter all together, resetting the local phase. restarting the game.
i just dont know what to do anymore, i cant progress this story at all at the moment and that just plainly sucks.
-Edit. Cause of issue seems to be koth leaving the alliance and thusly creates a conflict in the code during the "speak to Theron Shan" part of the quest after speaking to Tora outside.