Letter from IRS,,, Ref. Notice CP13

IRS indicates they found an error on my Federal Tax Return,  2021 Form 1040SR, which affects our ' RECOVERY REBAGE CREDIT '.. They changed my return to correct this error.  As a result " you don't owe us, and we don't owe you a refund" !!???   What is going on here ?????  My wife and I were entitled to a $2,800  tax refund..............   Please Advise what is going on.............