Help Unity Monobehaviour problem "No Monobehaviour scripts in the file, or their names don't match the file"

Question

#if UNITY_ADS
using UnityEngine;
using System.Collections;
using UnityEngine.Advertisements;

/// <summary>
/// This script handles all UnityAds functions, calling an ad after a certain number of level loads, or showing a rewarded ad
/// </summary>
public class PUPUnityAds : MonoBehaviour
{

public float minutes = 5;

static float lastAdTime = 0;

public void Awake()
{
// If enough time passed since the last ad, show a new ad
if ( Time.realtimeSinceStartup > lastAdTime + minutes * 60 )
{
ShowAd();
}
}

/// <summary>
/// Shows the ad if it's ready, and resets the timer for the next ad
/// </summary>
public void ShowAd()
{
if ( Advertisement.IsReady() )
{
Advertisement.Show();

lastAdTime = Time.realtimeSinceStartup;
}
}
}
#endif

Answer 1

I dont know if something is wrong, or if i have to remove something