Hello Jordan,
Thank you for reaching out to us.
Upon checking your account, there appears to be a billing issue associated with your account, specifically pending Pin and On hold due to no valid instruments. I would suggest checking this article (https://support.google.com/admob/answer/3198657?hl=en) that addressed the problems for PIN. For address verification address, you may check the following FAQ (https://support.google.com/admob/answer/2772302?hl=en&ref_topic=2772055#:~:text=Address%20verification%20FAQs) to know more about it. In addition to that, to maximize receiving ads, we recommend that you've set up your app-ads.txt file (https://support.google.com/admob/answer/9363762?hl=en&sjid=15039782890148975908-AP). These issues would cause the error you are experiencing at the moment.
Kindly note that the SDK just requests an ad to the ad server (E.g: AdMob) and I'm afraid that it doesn't have any control on fill rate / match rate of your app. This is more of an ad serving issue/ fill rate concern which is out of scope to our team. You will have to contact our Product Support Team (https://support.google.com/admob/thread/new?hl=en) in order to assist you further on this as anything concerning ad serving and billing is no longer within our team's scope.
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Mobile Ads SDK Team |