Just completed Loud and Clear mission and was told to speak to Maven Black-Briar problem is Maven is located in the Thalmor Embassy from an earlier mission and I tried going to speak to her but she is trapped in a room and cannot leave so I cannot finish the mission, anyone have any advice on this or can this please be fixed in another update.

Welcome to the forums, sorry to hear it's a bug that brought you here (but not surprised).

Is the quest marker pointing you to the Thalmor Embassy? Maven should be at the Bee and Barb, upstairs. I know it's a long shot, but check there again?

Sorry I can't help more, but I've never experienced this bug myself.

yeah quest marker is showing maven as being in the embassy.