Rigid body first person controller X axis mouse look

Hello,

I am really new to Unity an I can't get horizontal movement of the RigidBody First Person controller to work.

I seem to have added everything correctly and when I play I can move around and move the mouse up and down, but I can't look left and right. Using the arrow keys and collisions also work fine.

I looked around and some people have suggested adding mouse look, but I can't find it and the rigidbodyfps script seems to already have that attached.

I have messed around with the variables but nothing seems to work. What am I missing?