Bloodspurt textures missing

When I shoot someone, the blood ‘spray’ that comes out is a checkerboard but the splats on the walls behind are fine.
I believe it is the blood_impact particle as zombies don’t have a particle effect and the error “Attempted to create unknown particle system type “blood_impact_zombie_01”!” comes up.

Everything was normal and this happened.
Reinstalled 5 times.

PS. I have the human blood_impact but idk why this is happening.

What addons do you have? That’s not the normal missing texture.