Unity character controller problem

Hey everybody !
I’m using the character controller component for a simple local game. When i test the game in Unity, it work. But when I build the gam to test with 2 player, the player other player fall throught blocs (in both cases). I tried to put colliders (not triggers) on the character controller but it doesn’t work, in Unity, the player fall (not throught the meshes)

Can someone help me ?

Thank you, Bye, xyHeat

I finally find the solution !
I thought that my problem was a problem between the character controller and the collider, but it wasn’t.
The problem came from my Mouse look script. (I don’t know why but it was the problem)