OnActionReceived not being called

Question

I am trying to override the OnActionReceived method of the Agent class. But I don't think that the function is getting called and it doesn't give me any error.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Unity.MLAgents;
using Unity.MLAgents.Actuators;
using Unity.MLAgents.Sensors;

public class MoveCar : Agent
{
    // more code here

    public override void OnActionReceived(ActionBuffers actions)
    {
        // Get the acceleration, brake, and steer actions from the ML-Agents system
        float acceleration = actions.ContinuousActions[0];
        float brake = Mathf.Clamp(actions.ContinuousActions[1], 0, 1);
        float steer = actions.ContinuousActions[2];

        Debug.Log(acceleration);


        nowAcceleration = motorMax * acceleration;
        nowBrake = brakeMax * brake;
        nowSteer = steerMax * steer;

        // Apply the actions to the car
        wheelBackLeft.motorTorque = nowAcceleration;
        wheelBackRight.motorTorque = nowAcceleration;

        wheelBackLeft.brakeTorque = nowBrake;
        wheelBackRight.brakeTorque = nowBrake;
        // wheelFrontLeft.brakeTorque = nowBrake;
        // wheelFrontRight.brakeTorque = nowBrake;

        wheelFrontLeft.steerAngle = nowSteer;
        wheelFrontRight.steerAngle = nowSteer;

        updateWheel(wheelFrontLeft, frontLeftTransform);
        updateWheel(wheelFrontRight, frontRightTransform);
        updateWheel(wheelBackLeft, backLeftTransform);
        updateWheel(wheelBackRight, backRightTransform);
    }

    // more code here
}

I wanted the car to move and to see my acceleration in the Unity3d console but the car does nothing and nothing is printed in the console.