Unity应用中Block Store相关GoogleCertificatesRslt权限异常求助

我在Unity开发的应用中遇到如下错误：
BackupAccountManagerService: java.lang.SecurityException: GoogleCertificatesRslt: not allowed

我查阅过诸多类似问题，但未找到与Block Store相关的解决方案。尝试过修改Android API级别、从Google Play商店安装应用、本地构建版本、更换不同设备与Android版本，问题依然存在。

相关日志如下：

I/AppOps: updateUidProcState uid: 10227 procState: 3 capability:15
I/AppOps: commitUidPendingStateLocked() :: UID - 10227, 500 > 500, 8 > 15
D/NetworkPolicy: onUidStateChanged() uid: 10227, isForeground(true, 3)
? D/BoundBrokerSvc: onBind: Intent { act=com.google.android.gms.auth.blockstore.service.START dat=chimera-action: cmp=com.google.android.gms/.chimera.GmsApiService }
? D/BoundBrokerSvc: Loading bound service for intent: Intent { act=com.google.android.gms.auth.blockstore.service.START dat=chimera-action: cmp=com.google.android.gms/.chimera.GmsApiService }

[BackupAccountManagerService] Security Exception in getBackupAccount
    java.lang.SecurityException: GoogleCertificatesRslt: not allowed: pkg=com.example.app, sha256=[sha256 redacted], atk=false, ver=225014045.true (go/gsrlt)
        at yvp.d(:com.google.android.gms@225014045@22.50.14 (190408-499278674):3)
        at yvu.e(:com.google.android.gms@225014045@22.50.14 (190408-499278674):2)
        at udo.a(:com.google.android.gms@225014045@22.50.14 (190408-499278674):2)
        at uau.a(:com.google.android.gms@225014045@22.50.14 (190408-499278674):0)
        at uaw.b(:com.google.android.gms@225014045@22.50.14 (190408-499278674):4)
        at uaw.a(:com.google.android.gms@225014045@22.50.14 (190408-499278674):0)
        at nzy.b(:com.google.android.gms@225014045@22.50.14 (190408-499278674):1)
        at com.google.android.gms.auth.blockstore.service.BlockstoreApiChimeraService.d(:com.google.android.gms@225014045@22.50.14 (190408-499278674):0)
        at com.google.android.gms.auth.blockstore.service.BlockstoreApiChimeraService.a(:com.google.android.gms@225014045@22.50.14 (190408-499278674):4)
        at asoe.a(:com.google.android.gms@225014045@22.50.14 (190408-499278674):0)
        at aspc.a(:com.google.android.gms@225014045@22.50.14 (190408-499278674):0)
        at aspf.gi(:com.google.android.gms@225014045@22.50.14 (190408-499278674):45)
        at zwe.onTransact(:com.google.android.gms@225014045@22.50.14 (190408-499278674):5)
        at android.os.Binder.transact(Binder.java:1100)
        at alqf.onTransact(:com.google.android.gms@225014045@22.50.14 (190408-499278674):17)
        at android.os.Binder.transact(Binder.java:1100)
        at arlh.onTransact(:com.google.android.gms@225014045@22.50.14 (190408-499278674):1)
        at android.os.Binder.execTransactInternal(Binder.java:1220)
        at android.os.Binder.execTransact(Binder.java:1179)

内容的提问来源于stack exchange，提问作者Kubuś Puchatek