Unable to Load Meta (Facebook) Native Ads via Mediation – Adapter Instantiation Failing - No Fill

[Madhav Aneraye]

Dear Google Ad Manager Support Team,

I am currently implementing native ads in my Android app using Google Ad Manager mediation with the Meta Audience Network as a mediated partner.

The integration is working for test ads — which confirms the SDKs and mediation adapter (com.google.ads.mediation.meta.MetaAdapter) are properly integrated in the app. However, when attempting to load live native ads, I consistently receive the following error:

vbnet

CopyEdit

Ad failed to load: 3 Unable to instantiate mediation adapter class. Adapter: com.google.ads.mediation.facebook.FacebookAdapter

{
                   "Response ID": "bX4QaKiKAsirv8IPlcLIgAU",
                   "Mediation Adapter Class Name": "",
                   "Adapter Responses": [
                     {
                       "Adapter": "com.google.ads.mediation.facebook.FacebookAdapter",
                       "Latency": 0,
                       "Ad Source Name": "Facebook",
                       "Ad Source ID": "XXXXX",
                       "Ad Source Instance Name": "",
                       "Ad Source Instance ID": "XXXXX",
                       "Credentials": {
                         "pubid": "XXXXX_XXXXX"
                       },
                       "Ad Error": {
                         "Code": 3,
                         "Message": "Unable to instantiate mediation adapter class.",
                         "Domain": "com.google.android.gms.ads",
                         "Cause": "null"
                       }
                     }
                   ],
                   "Response Extras": {}
                 }

Thanks

[Mobile Ads SDK Forum Advisor]

Hi,

Thank you for contacting the Mobile Ads SDK Support team.

It is always recommended to keep the SDKs up to date to avoid such issues. As of today, the latest version of Android is 24.2.0.

The Error code 3, no fill error means that the ad request was successful, but no ad was returned due to lack of ad inventory.

When testing, ensure that you have the Facebook app installed on the test device and be logged in with a valid Facebook login. See Meta's documentation for more details. Without this, it is expected that Facebook might not bid (though they still might get bid requests).

kindly provide the below information for more investigating this issue.

• app ID 
• adUnit ID
• GMA SDK version

Thanks,
 

Mobile Ads SDK Team

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[2025-04-30 23:08:51Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01qVUYr:ref" (ADR-00303111)

[Mobile Ads SDK Forum Advisor]

Hi,

Thank you for providing the requested information.

I ran the Google NativeAdsExample with the provided app ID and ad unit ID, in the mentioned GMA SDK and Meta versions and I can see the ads are not loading, and the reported issue “No fill” is replicating. Please note this behavior isn't controlled by the Mobile Ads SDK. 

Since you have confirmed that the Meta test Ads are working as expected, I assume that the meta integration is successful. As a next step to help resolve the issue “No fill” you've been experiencing with your account, we have already added another support team Product Support Team with expertise in No fill troubleshooting. You'll receive an email shortly with all the teams involved.

Thanks,
 

Mobile Ads SDK Team

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[2025-05-05 10:18:05Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01qVUYr:ref" (ADR-00303111)

[Madhav Aneraye]

Thank you so much for your response.

Now I am using the following versions :

implementation 'com.google.android.gms:play-services-ads:24.2.0'

implementation 'com.facebook.android:audience-network-sdk:6.19.0'
implementation 'com.google.ads.mediation:facebook:6.19.0.1'

App ID (GAM): ca-app-pub-6878124394512900~6399598913

Facebook App ID: 506084728897862

Facebook Ad Unit ID: 506084728897862_506086435564358

DFP Ad Unit ID: /6428519/whiz/wisc

Let me know if you want more information.

I am looking forward.

Please give a response as soon as possible. 

Thanks & Regards,

[Madhav Aneraye]

Thank you so much for your reply:)

I am using the following version of dependencies:

implementation 'com.google.android.gms:play-services-ads:24.2.0'

implementation 'com.facebook.android:audience-network-sdk:6.19.0'
implementation 'com.google.ads.mediation:facebook:6.19.0.1'

Also, I used the following data:

GAM App ID: ca-app-pub-6878124394512900~6399598913

DFP App ID: /6428519/whiz/wisc

Facebook App ID: 506084728897862

Facebook AD Unit ID: 506084728897862_506086435564358  

Please give as soon as possible.

Let me know if you want more information.

Thanks & Regards.

On Thursday, 1 May 2025 at 04:39:55 UTC+5:30 Mobile Ads SDK Forum Advisor wrote:

[Madhav Aneraye]

Thank you so much for your reply:)

I am using the following version of dependencies:

implementation 'com.google.android.gms:play-services-ads:24.2.0'
implementation 'com.facebook.android:audience-network-sdk:6.19.0'
implementation 'com.google.ads.mediation:facebook:6.19.0.1'

Also, I used the following data:
GAM App ID: ca-app-pub-6878124394512900~6399598913
DFP App ID: /6428519/whiz/wisc
Facebook App ID: 506084728897862
Facebook AD Unit ID: 506084728897862_506086435564358  

Please give as soon as possible.
Let me know if you want more information.

Thanks & Regards.

On Thursday, 1 May 2025 at 04:39:55 UTC+5:30 Mobile Ads SDK Forum Advisor wrote:

[Madhav Aneraye]

Thanks for responding. 

I am waiting for the Product Support Team's response 

[Mobile Ads SDK Forum Advisor]

Hi,

Kindly note that the meta mediation Ads and No fill are out of scope for our team. So that is the reason, we routed this case to Product Support Team.
Hi @Publisher-support team,
This issue seems to be more of an ad serving issue rather than something specific to the code implementation of the Mobile Ads SDK. Please assist the user accordingly.

Thanks,
 

Mobile Ads SDK Team

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[2025-05-06 04:12:07Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01qVUYr:ref" (ADR-00303111)

[Mobile Ads SDK Forum Advisor]

Hi Madhav,

We are investigating this issue and will get back to you after sometime.
 

Thanks,
 

Mobile Ads SDK Team

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[2025-05-06 22:39:13Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01qVUYr:ref" (ADR-00303111)

[Madhav Aneraye]

Thank you for your response. 

I am waiting for your reply. Please give me a response as soon as possible. 

I am losing my business day by day.

Thanks & Regards,

[Mobile Ads SDK Forum Advisor]

Hi Madhav,

I will check this issue with the wider team. Meanwhile your patience is appreciated.

Thanks,
 

Mobile Ads SDK Team

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[2025-05-08 10:30:20Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01qVUYr:ref" (ADR-00303111)

[Mobile Ads SDK Forum Advisor]

Hello Madhav,

Thanks for reaching out.

I have replied to you privately, as there is information sensitive to your account.

Please Review the authorization status of your domains and fix your app-ads.txt file to resolve the no fill issue.

Thanks!
 

Thanks,
 

Joshua Hui Mobile Ads SDK Team

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[2025-05-11 23:41:10Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01qVUYr:ref" (ADR-00303111)

[Madhav Aneraye]

Really Thank you so much for your help and time :)

Now I am able to load the Facebook test ads. 

Thanks & Regards,

Madhav Aneraye

[Madhav Aneraye]

Hello Team,

Now, I am able to see the Facebook test on a debug application. 

I released my application on Playstore with the same changes. I want to display the Facebook Native ads using meditation. 

But, Now in facebook I am not looking to ads an impressions. 

I have attached an image for your reference.

Please guide me what to do next ?

I am waiting for your reply.

Thanks & Regards,

[nell adi87]

How do?

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[Mobile Ads SDK Forum Advisor]

Hello Madhav,

Thanks for reaching out.

Looking at the screenshot provided, you're viewing the Meta yield configured with Meta waterfall, which isn't Meta bidding.
As per my previous email, Meta waterfall was already deprecated, so it makes sense there's no impression or fill rate for it.

 

Thanks,
 

Joshua Hui Mobile Ads SDK Team

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[2025-05-16 23:27:16Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01qVUYr:ref" (ADR-00303111)

[Madhav Aneraye]

Thanks for your reply

Please can you guide me, how to setup for bidding. I was tried and cross checked lots of time. 

And if this is waterfall setup then why there is showing ads. Also, where we can see this is water fall or bidding setup.

[Christian Beso]

What's wrong with all of my account ! You have restricted me for 2 days ! I didn't even know my violation !

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[Mobile Ads SDK Forum Advisor]

Hello Madhav,

For setting up Meta bidding in Ad Manager, please follow the instructions in our dev docs [Android | iOS].

 

Thanks,
 

Joshua Mobile Ads SDK Team

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[2025-05-20 04:07:07Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01qVUYr:ref" (ADR-00303111)

[Madhav Aneraye]

Hello Team,

I have attached a video link on Facebook test ads via mediation.

This video contains a test ad inspector and also serves ads using Facebook bidding.

https://drive.google.com/file/d/1nhZ6v48XE9_nTEvfo4dO3m6NVhtGgG-g/view?usp=drive_link

Thanks & Regards,

On Thu, 22 May 2025 at 09:36, Madhav Aneraye <madhava...@gmail.com> wrote:

How can we now this is water fall or bidding ?

[Madhav Aneraye]

How can we now this is water fall or bidding ?

[Mobile Ads SDK Forum Advisor]

Hello Madhav,

Thanks for the update.

It seems Meta bidding was working on your end. Also, regarding your question in the previous email, Meta only supports bidding, not waterfall.

Please feel free to reach out if you need anything from us.

 

Thanks,
 

Joshua Mobile Ads SDK Team

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[2025-05-23 06:57:16Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01qVUYr:ref" (ADR-00303111)

[Madhav Aneraye]

Thank you for the clarification. 

But why am I not seeing revenue or ad impressions on the Facebook ad dashboard?

I already followed all the steps and the documentation.

Day by day I am losing my business.

[Mobile Ads SDK Forum Advisor]

Hello Madhav,


Since we don't have control over what's shown in the Meta dashboard or how their dashboard works, I suggest reaching out to the Meta team about this. Provide them with the Charles log that captures their ad requests and responses, and the impression pings. Our Meta adapter basically calls the Meta SDK to load and show ads, but we don't own the logic behind it.

 

Thanks,
 

Joshua Mobile Ads SDK Team

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[2025-05-27 19:51:29Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01qVUYr:ref" (ADR-00303111)