So in the Butcher's laboratory, you have to enter a code on the leftmost panel, which will apparently reveal the way to find the code for the rightmost panel.

I'll admit that I couldn't figure this puzzle out, so I looked its solution up. When I entered the code on the leftmost panel, nothing happens. I made sure that I was doing it correctly, but the game didn't progress.

I was able to skip the puzzle, however, by looking up the code for the rightmost panel and then go to the next sequence. But I'm curious if anyone else experienced this issue.

Edit: ugh, never mind, I'm an idiot. I REALLY misread one of the symbols and even checked it twice. I must be getting senile.