So I found a hidden dagger while serving wine to Sigismund and I am able to kill him... but every time I get just regular ending, that guards killed me, because I was not careful enough, while there are videos, that by killing Sigismund you should be able to get a secret ending of killing Sigismund and preventing Hussite wars...

Is this is something that was removed with patches? Anyone else able to get the secret ending currently?

I know this is basically just a different game over screen, because you cannot continue from this... but what I am saying is that I am not able to reproduce it... whenever I try to kill Sigismund, I get just regular "you were not careful enough" game over screen... at some youtube video, I saw it even mentioned, that it is not possible to reach this "ending" since the last patch.