hello guys,ive got a problem on my map,when i play it,i dont know why the sun never cast walls and shadow,could you help me please

In a new script placer map the shadows work so you must have deleted/changed your skybox or lightgrid or worldspawn settings.

so what can i do

If you didn't fix your lighting/shadows upload the .map and i will check it.

when i create a defoult map the problem still persist,do you think its a problem of my cod?

https://drive.google.com/open?id=1ZX6zdwPy_NttV1z6LuKtNqEggMy1Kkxo 
here my .map