Can Timeout

Im getting a Can Timeout with this code, I’m only connecting the pcm to the can circuit

/*----------------------------------------------------------------------------*/
/* Copyright (c) 2018 FIRST. All Rights Reserved.                             */
/* Open Source Software - may be modified and shared by FRC teams. The code   */
/* must be accompanied by the FIRST BSD license file in the root directory of */
/* the project.                                                               */
/*----------------------------------------------------------------------------*/

package frc.robot;

import edu.wpi.first.wpilibj.Compressor;
import edu.wpi.first.wpilibj.DoubleSolenoid;
import edu.wpi.first.wpilibj.Joystick;
import edu.wpi.first.wpilibj.Spark;
import edu.wpi.first.wpilibj.SpeedControllerGroup;
import edu.wpi.first.wpilibj.TimedRobot;
import edu.wpi.first.wpilibj.drive.DifferentialDrive;

/**
 * The VM is configured to automatically run this class, and to call the
 * functions corresponding to each mode, as described in the TimedRobot
 * documentation. If you change the name of this class or the package after
 * creating this project, you must also update the build.gradle file in the
 * project.
 */
public class Robot extends TimedRobot {
  /**
   * This function is run when the robot is first started up and should be used
   * for any initialization code.
   */

    //***Controllers***
    public Joystick driver_Controller;
    public Joystick operator_Controller1;

    //#region Motores
    //***Motors***
    public Spark left_ChassisMaster;
    public Spark left_ChassisSlave1;
    public Spark left_ChassisSlave2;

    public Spark right_ChassisMaster;
    public Spark right_ChassisSlave1;
    public Spark right_ChassisSlave2;

    /*
    public Spark arm_Motor1;
    public Spark arm_Motor2;
*/
    //***Compressor***
    public Compressor airCompressor;

    
    //***Solenoids***
    //Gearbox
    public DoubleSolenoid gearbox;

     //***Chassis***
  private DifferentialDrive driveTrain;

  //***Reversa***
  protected boolean reverse = false;

   //Toggle
   boolean toggle1 = true;
   boolean toggle2 = true;

  @Override
  public void robotInit() {

    //***Motors Id Assigned***
    left_ChassisMaster = new Spark(0);
    left_ChassisSlave1 = new Spark(1);
    left_ChassisSlave2 = new Spark(2);

    right_ChassisMaster = new Spark(3);
    right_ChassisSlave1 = new Spark(4);
    right_ChassisSlave2 = new Spark(5);
/*
    arm_Motor1 = new Spark(1);
    arm_Motor2 = new Spark(2);
*/
    SpeedControllerGroup chassis_Left = new SpeedControllerGroup(left_ChassisMaster, left_ChassisSlave1, left_ChassisSlave2);
    SpeedControllerGroup chassis_Right = new SpeedControllerGroup(right_ChassisMaster, right_ChassisSlave1, right_ChassisSlave2);

    //***Chassis's Motors Assigned***
    driveTrain = new DifferentialDrive(chassis_Left, chassis_Right);

     //***Air Compressor Id Assigned***
     airCompressor = new Compressor(0);

     //***AirCompressor Security***
     airCompressor.setClosedLoopControl(true);

     //***AirCompressor Start***
     airCompressor.start();

     //***States Values Assigned***
     airCompressor.enabled();
     airCompressor.getPressureSwitchValue();
     airCompressor.getCompressorCurrent();

     //***Solenoid Id Assigned***
     //Gearbox Assigned
     gearbox = new DoubleSolenoid(0, 2, 3);


  }

  public void kart1()
  {
      //****************
      double x = (driver_Controller.getRawAxis(4));
      double y = -(driver_Controller.getRawAxis(1));

      double r = Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2));
      if (r > 1) {r = 1;}
      
      double kLimiteX = 0.30;//75; //<<-- Sensibilidad de giro <<
      
      double t = ((r - Math.abs(x)) * (1 - kLimiteX)) + (r * kLimiteX);
      if (t > 1) { t = 1;}
      
      reverse = false;
      //***Foward & reverse***
      if(y < 0)
      {
          double temp = -t;
          t = -r;
          r = temp;
          
          reverse = true;
      }
      
      if (x < 0)
      {
          double temp = t;
          t = r;
          r = temp;
      }
      
      driveTrain.tankDrive(r,t);
  }

  public void kart2()
  {
      double x = (driver_Controller.getRawAxis(4));
      double y = -(driver_Controller.getRawAxis(1));
  
      double r = Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2));
      if (r > 1) {r = 1;}
      
      double kLimiteX = 0.30;//75; //<<-- Sensibilidad de giro <<
      
      double t = ((r - Math.abs(x)) * (1 - kLimiteX)) + (r * kLimiteX);
      if (t > 1) { t = 1;}
      
      reverse = false;
      //***Foward & reverse***
      if(y < 0)
      {
          double temp = -t;
          t = -r;
          r = temp;
          
          reverse = true;
      }
      
      if (x < 0)
      {
          double temp = t;
          t = r;
          r = temp;
      }
      
      driveTrain.tankDrive((r * 0.50) , (t * 0.50));
  }

  @Override
  public void autonomousInit() {
  }

  @Override
  public void autonomousPeriodic() {
  }

  @Override
  public void teleopInit() {
  }

  @Override
  public void teleopPeriodic() {

    //#region Toggle
    if(operator_Controller1.getRawButton(3)){
      if(toggle2 == true){
       toggle2 = false;
      }
     }
   
     if(operator_Controller1.getRawButton(4)){
       if(toggle2 == false){
         toggle2 = true;
       }
      }
  
    if(operator_Controller1.getRawButton(5)){
      if(toggle1 == true){
       toggle1 = false;
      }
     }
   
     if(operator_Controller1.getRawButton(6)){
       if(toggle1 == false){
         toggle1 = true;
       }
      }

    if(toggle2)
    {
      if(toggle1){
        kart1();
      } 
      else 
      {
        kart2();
      }
    }
    else
    {
      left_ChassisMaster.stopMotor();
      right_ChassisMaster.stopMotor();
    }

  }

  @Override
  public void testInit() {
  }

  @Override
  public void testPeriodic() {
  }

}

Im using the sparks max but with pwm

Not sure what behavior this would cause if it’s not, but are you sure your PCM id is set to 0?

That was it, Thanks!
Am also getting this error

ERROR  1  Unhandled exception: java.lang.NullPointerException  frc.robot.Robot.teleopPeriodic(Robot.java:194) 
Warning at edu.wpi.first.wpilibj.RobotBase.startRobot(RobotBase.java:274): Robots should not quit, but yours did! 
ERROR  1  The startCompetition() method (or methods called by it) should have handled the exception above.  edu.wpi.first.wpilibj.RobotBase.startRobot(RobotBase.java:276)

You never instantiate your operator_controller1 joystick.

You have public Joystick operator_Controller1; but in your robotInit() you never do operator_Controller1 = new Joystick(0);

You’re not instantiating your Joystick members.