That is a generic IRS message they use when the IRS removes the Recovery Rebate Credit from your Form 1040 Line 30 because the IRS has records showing that you were sent the 3rd stimulus payment.
If you checked your bank account in the March - May 2021 timeframe and there is not a EIP3 payment from the IRS then go to this IRS website for how to start a trace on the payment - https://www.irs.gov/newsroom/questions-and-answers-about-the-third-economic-impact-payment-topic-j-p...
