Quest "Chasing Vargangka"...

So I have to kill this raid boss...

but whatever I try, i'm just teleported out of the room a soon as I enter or try to engage the guardian eye...

any ideas why I'm not allowed to try kill it?

I do have quest and quest item.

There is no high level or any other level players around.

I'm not in a party...

I'm out of ideas...

tried looking for videos, tried googling it, nobody seems to have this problem but me...