"'pwm' was not declared in this scope" - please help

Hi, I'm having some problem with dpwnloading the OpenCat code onto Bittle, and this comes up;

OpenCat:603:17: error: 'pwm' was not declared in this scope

pwm.setPWM(pin(target[0]), 0, duty);

^~~

OpenCat:610:19: error: 'pwn' was not declared in this scope

pwn = 0;

^~~

C:\Users\--\Downloads\OpenCat-jump\OpenCat-jump\OpenCat\OpenCat.ino:610:19: note: suggested alternative: 'pin'

pwn = 0;

^~~

pin

OpenCat:611:19: error: 'pwm' was not declared in this scope

pwm.setPWM(pin(target[0]), 0, duty);

^~~

How do I solve this?