Can't pass the barricade in Centaur Fortress.

I'm stuck. Checked all available rooms, killed all centaurs but the gate is closed and won't move. Grogor walkthrough does not mention anything about switches or such. Did I miss anything?

Wow, that's crazy! I don't remember ever seeing a gate there. What point in the story are you at?

Okay, I got it! Apparently DZK/Indinera put that thing there to prevent a possible glitch from completing the quest before you actually got it. All you have to do is get to rank 2 in the Mage Guild, and then go up the left staircase and speak to Tara, the red-haired woman to the south, and she will give you the quest, which magically deactivates the gate!

Oh, I see. Thanks for help I'm still on day 2 (it took me a few days to get the awful lash wolf tooth), the centaurs are my last side quest before the mosquito swamp.