Lighting and rendering/project is suddenly acting weird

hi I’m having a problem with my project, when i was working on it yesterday it was all working fine but when i first opened it today it started acting weird, lighting doesnt work, rendering is acting weird and it’s probably not a problem from the scene lighing because rendering/lighting doesnt work in the character blueprint also I cant move or editing anything in the scene at all, and when I make a new scene, that new scene would be empty (only sky stuff are working)

lit scene:


unlit (faces are nonsensical):

character blueprint:

the map’s mesh editer looks completely fine

other projects are working fine so it’s probably not the whole engine being corrupted

things I tried that didn’t fix anything:
-playing with the scene lighting
-checking the materials
-making new scenes
-adding new objects (I couldn’t)
-changing some project settings (despite me never changing them yesterday)
-cloning the project
none of those fixed anything, so if any one knows how to fix it

here is some info to help:
-unreal version is 5.4.1
-all I did yesterday was using the cubeGrid tool