Grunker
RPG Codex Ghost
Hm, I think the light around the plates is red and when you step on them it goes green. Maybe I'm mistaken but there's a big stone door with all four symbols underneath it and tnose definitely light up green as you step on the appropriate plates. And you don't have to stand on the plates, just step on them.
If nothing anywhere lights up green then something must be glitchy.
Something's definetely glitchy then. Stepped multiple times on the earth plate yet nothing lights up on the door.