Hey! I don't know if this has been solved yet or not! (I hope so with how long its been lol) A buddy of mine on PC had the same issue and he actually had to go and reacquire the quest (It wouldn't even let him access the mission at one point. Gave him a bs quest inventory full error) before it actually would allow him to progress
Unfortunately it was never resolved. Bungie never even acknowledged this issue.
So I had to do the first mission of Forsaken again to access the Tangled shore again. Which wasn't great but at least it worked.
how were u able todo first mission again? my hunter has 0 issues but my warlock n titan seem to be unable to access it. I went to tangled shore on all 3 characters got the lure had to go to dreaming city to use lure completed it and it locked me out again. saying quest inventory is full but I only have 8 spaces outta 63 filled. wish bungie cared about fixing bugs more then they do reskinning armor n weapons 😒 so now I got a mission says return to crow n I can't even access it cause bungie won't fix anything