Hello, I've experienced a gamebreaking bug, and thus, can't progress...I haven't found any mention of it elsewhere on the internet. It's the GOG version, in case that matters. I have PST fix, PST tweak, ghostdog's UI, ddrawfix, and PST UB installed.
[spoilers below]
I entered the Foundry and gained access to secret things before claiming my goods from the Advocate. I was able to enter, because I was on a quest from someone at the market - I think it was giving a note to Keldor. I joined the Godsmen, saw the 'secret weapon', and spoke to Nihl Xander - he told me I commissioned the project and needed to bring him things.
I tried leaving the foundry, to get the blue-green bottle from the apothecary, but the main gate was locked! I spoke to everyone, there is absolutely no way to get it unlocked.
Eventually, I tried killing myself outside near the gate. I respawned just outside the gate - still locked. I went to the Advocate, picked up the foundry receipt to get back inside, and returned to the gate.
I am able to speak to the guards, and tell them I have an item to be claimed. They say they'll open the gate...but it never opens.
Saves linked - the quicksave is inside the foundry, before dying. The autosave is outside, after I picked up the receipt. This should be an easy one to fix - just make the guards actually open the gate when you ask!