I do not have the bug you are experiencing, so I can only offer suggestions on alternatives that may work.

I tossed the hand bag in my camp storage, but
I had Gortash's Hand + Bhall Amulet in my inventory and that seems to work as well. I believe the reason this works, is because Orin specifically asks for you to kill Gortash first.
I also killed the murder tribunal though, which counts as an unorthodox tribute to Bhall, so it could have also been that.

If you have not done so already, try killing Gortash, grab his hand and see if that helps with the Bhall temple door.

^ If the above does not work:
Originally Posted by bogart69
I read that it may be a bug related to inventory that was triggered after the latest patch.
I have read this as well, there was a reddit post here with work-arounds:
Originally Posted by JusticeofTorenOneEsk
Original post:
I've noticed a recent influx of posts about the game not realizing that characters have a specific item necessary for a quest.
....
Amulet of Bhaal (workaround: you can use Knock on the first door near the Undercity Ruins waypoint, or shoot the corpse hanging over the circle.
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New Edit 1/11:
It's unclear exactly what mod issues (and it looks like now also non-mod issues) are causing the bug, as there have been multiple different fixes that have worked for various people. List of some potential fixes:

Whatever you do, please be sure to be careful and back up your saves -- I'm collating info here in case it's helpful, but nothing here is a guaranteed risk-free fix, and Larian will still be able to give you the best advice.

Last edited by Lillith; 14/01/24 12:13 PM.