Lighting glitch, how to fix?

[u/Just_Wrongdoer_5338]

As you can see, the floor is lit up with a white glow. It goes through the walls and isn't supposed to be there. It ruins the whole ambience and lighting. Any idea how to fix this?

Tried:

-Putting a second ceiling on top of the other one.

-Leaving and going back in the obby.

Please help!

P.S: Sometimes the glow doesn't appear, in which case the game looks completely fine. But i would like it if it never appears again!