It works fine on the Arduino IDE, but always returns an error on TinkerCad, where i am required to submit my task. I tried changing the return type of the functions, as always, compiles on the Arduino IDE but not on Tinkercad, it also highlights the #define lines. Below the parts that throw and error.

enum Motions{forward, backward, right, left}; // will be used as direction too, forward: upward, 
//backward: downward

Motions direction = right; //assuming the robot is facing left at the starting position
int x = 0, y = 0;


  

Motions rotate_cw(){
  switch(direction){
    case forward: return right;
      break;
    case right: return backward;
      break;
    case backward: return left;
      break;
    case left: return forward;
      break;  
  }
}


Motions rotate_ccw(){
  switch(direction){
    case forward: return left;
      break;
    case left: return backward;
      break;
    case backward: return right;
      break;
    case right: return forward;
      break;  
  }
}



void loop() {
  if(!digitalRead(forward_button)){
    move(forward);
    print_location(forward);
  }
  else if(!digitalRead(backward_button)){
    move(backward);
    print_location(backward);
  }
  else if(!digitalRead(right_button)){
    move(right);
    direction = rotate_cw();
  }
  else if(!digitalRead(left_button)){
    move(left);
    direction = rotate_ccw();
  }
}```