CS0193#

The * or -> operator must be applied to a pointer

It is unlikely that you should literally interpret this error, instead it is more likely a formatting mistake.

Resolution#

Remove the stray semicolon (;) in the middle of the line of code referenced by the stack trace.

Example#

float mouseX = Input.GetAxis("Mouse X"); * mouseSensitivity;
//    This semicolon shouldn't be here ^