!IsNormalized (normal) help, I've looked already

I’ve checked a bunch of forums and previous questions and none of them are doing it for me. I’ve narrowed down to when I get this error. If I change my directional light from no shadows to any type of shadows during runtime the error gets spammed. I don’t understand why, or how I’d solve it.

soooo. lots of !IsNormalized have said problems with cameras and point light ranges… another one to tag on is that if you’re trying to do any sort of shadows, you CANNOT use terrain. The error will spammm

try not set Shadow Distance to zero ( in Quality Setting ) for example when you use directional Light with soft shadow plus painted trees on a terrain.