How can i get into the brewery?

[Pr0-V]

Hello everyone, yesterday I finished the quest in Golden Hills that asked me to find the Mother Goddess Statue. In that area there is also an Elf that gave me another quest: to kill William, the Paladin; that elf is standing in front of a doorway that I can't open. There are some bombs nearby, but they are too far from the doorway to blow it up. I've searched on the internet and found that the doorway is the passage to the Brewery. So, How can I open it? On youtube i see that it opens automatically, just standing there, but nothing appens in my case. Are there some requirements? Maybe I can't control enough minions yet (30), or I have to do something else before that (My other quests are just to kill William the dark paladin and find the source of the plague in Heaven's peak).
In the very first 20 secs of this video you can see which passage I'm talking about:
https://www.youtube.com/watch?v=bZ0oESD1NV4

[Machpella]

You need to complete these quests first. Then the gate will open. i also couldn't get into the brewery but when i did those quests (to kill the black and find the source of plague) i arrived at the golden hills pass and got a message that it is open now.

[darkflemish]

quest: to kill William, the Paladin ==> you must go to Heaven's Peak.
Then back to Golden Hill to get into the Brewery.

Success