Just went through the dimensional gate (spoilers)

[Zachalmighty]

I just went through the dimensional gate after finding Maki's mom as a giant demon and deciding not to kill her. I'm currently going through what was the SEBEC building and I've come to a floor puzzle.

Problem is, I've gotten all the tiles to deactivate and tried to open the door and it won't open. I also tried activating every tile and that didn't work either. What's the trick to opening the door?

[Zachalmighty]

No one?

[DamageCity]

Should've put this in the help thread.

[Zachalmighty]

I didn't even notice that help thread.

[Guni]

Is this in the final floor where the floor tiles turn red? If so, then they have to be activated in the same way they appear on the ceiling.