Advertisement.IsReady returns false everytime

So I'm trying to get Unity Ads to work, I'm doing it for the first (I'm a total 1000% newb) time so I'm going along the instructuins in https://unityads.unity3d.com/help/monetization/getting-started

This is what I've done so far:
I downloaded this Asset and imported it to my project


I settled the organization thing in the Dashboard

In the project with the SDK imported, I toggled the Ads thing with the Testing checked

then added some code to test it out (I added the script to an object in the scene), based on the PLACEMENTs section I setted the normal video and rewarded video.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.Advertisements;
5.  
6. public class AdManager : MonoBehaviour
7. {
8.     public void PlayThatAdMister()
9.     {
10.         if(Advertisement.IsReady("video"))
11.         {
12.             Advertisement.Show("video");
13.             Debug.Log("This thing should show an AD");
14.         }
15.         else
16.         {
17.             Debug.Log("Advertisement is ready :" + Advertisement.IsReady("video"));
18.         }
19.     }
20.  
21.     public void PlayARewarded()
22.     {
23.         if(Advertisement.IsReady("rewardedVideo"))
24.         {
25.             Advertisement.Show("rewardedVideo");
26.             Debug.Log("This thing should show a Rewarded AD");
27.         }
28.         else
29.         {
30.             Debug.Log("Advertisement is ready :" + Advertisement.IsReady("video"));
31.         }
32.     }
33.  
34.  
35.     private void Update()
36.     {
37.         if (Input.GetKeyDown(KeyCode.E))
38.         {
39.             PlayThatAdMister();
40.             Debug.Log("I am pressing E key");
41.         }
42.  
43.         if(Input.GetKeyDown(KeyCode.R))
44.         {
45.             PlayARewarded();
46.             Debug.Log("I am pressing E key");
47.         }
48.     }
49. }
50.  

It was not showing a thing so I wrote some logs as shown above. It turns out that the Advertisement.IsReady was returning false always...

 

Do some checks:

• Is Advertisement.Initialize() working? (I don't see ad initialization in your script)
  
• Is the placement name correct?

I also suggest you to turn off "test mode enabled" on Editor and using "override client" (force test mode across all devices) via Dashboard
Hope this helps