Levelplay ads always unavailable

Unity Engine
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1

My current account is still under approval but i guess this doesn’t matter.
This is my code:

using System;
using System.Threading;
using UnityEngine;
using UnityEngine.Advertisements;


public class AdsInitializer : MonoBehaviour
{
    public static bool isLoaded = false;
    public GameObject player;
    public Canvas Gamecanvas;
    public Canvas losecanvas;
    public string appid = "1ea9478b5";
    void Start()
    {
        IronSource.Agent.init(appid);
        IronSource.Agent.validateIntegration();
        IronSourceEvents.onSdkInitializationCompletedEvent += SdkInitializationCompletedEvent;
        losecanvas.enabled = false;
        IronSourceRewardedVideoEvents.onAdRewardedEvent += RewardedVideoOnAdRewardedEvent;
    }
    private void SdkInitializationCompletedEvent() { }
    void RewardedVideoOnAdRewardedEvent(IronSourcePlacement placement, IronSourceAdInfo adInfo)
    {
        //TODO - here you can reward the user according to the reward name and amount
        Debug.Log("Rewarded");
        isLoaded = true;
    }
    public void continuegame()
    {
        bool available = IronSource.Agent.isRewardedVideoAvailable();
        if (available)
        {
            IronSource.Agent.showRewardedVideo();
        }
        else { Debug.Log("Unavailable"); }


    }

    public void Restart()
    {
        player.transform.position = new Vector3(-5.6f, -3.2f, 0);
        player.SetActive(true);
        losecanvas.enabled = false;
        Time.timeScale = 1f;
        Gamecanvas.enabled = true;
    }
    void OnApplicationPause(bool isPaused)
    {
        IronSource.Agent.onApplicationPause(isPaused);
    }

}

I would call the continuegame function everytime button is pressed. However, the code always gives out “unavailable” and I don’t know how to solve it.