Constant Error message every time i shoot a bullet, and bullets seem to disappear after being shot. And my screen turns black if i am close to other gunshots

Anytime I shoot in the game, I get an error message (below)

Mesh bounds min=(-nan(ind), -nan(ind), -nan(ind)), max=(-nan(ind), -nan(ind), -nan(ind)). Please make sure the mesh i...

[Error] : Mesh 'TracersLight': abnormal mesh bounds - most likely it has some invalid vertices (+/-inifinity or NANs) due to errors exporting

Bullets seem to just disappear after they are shot (no bullet holes in anything and no damage is done to enemies and no damage is done to me) and if i get near any other gun shots my screen goes black for a short time.