Firebase 数据不显示在 flutter 应用程序中

我正在尝试在使用 flutter 制作的应用程序中使用 Firebase 显示数据。这一直有效直到几个小时前，之后尽管我的代码没有发生任何变化，它仍然停止工作。我收到以下警告：

W/DynamiteModule( 3174): Local module descriptor class for com.google.android.gms.providerinstaller.dynamite not found.
I/DynamiteModule( 3174): Considering local module com.google.android.gms.providerinstaller.dynamite:0 and remote module com.google.android.gms.providerinstaller.dynamite:0
W/ProviderInstaller( 3174): Failed to load providerinstaller module: No acceptable module com.google.android.gms.providerinstaller.dynamite found. Local version is 0 and remote version is 0.
I/TetheringManager( 3174): registerTetheringEventCallback:com.example.icse_quizapp
I/le.icse_quizap( 3174): The ClassLoaderContext is a special shared library.
I/le.icse_quizap( 3174): The ClassLoaderContext is a special shared library.
D/nativeloader( 3174): classloader namespace configured for unbundled product apk. library_path=/product/priv-app/PrebuiltGmsCore/lib/x86:/product/priv-app/PrebuiltGmsCore/PrebuiltGmsCore.apk!/lib/x86:/product/lib:/system/product/lib
W/ProviderInstaller( 3174): Failed to report request stats: com.google.android.gms.common.security.ProviderInstallerImpl.reportRequestStats [class android.content.Context, long, long]
W/le.icse_quizap( 3174): Accessing hidden field Ldalvik/system/BaseDexClassLoader;->pathList:Ldalvik/system/DexPathList; (greylist, reflection, allowed)
W/le.icse_quizap( 3174): Accessing hidden field Ldalvik/system/DexPathList;->nativeLibraryDirectories:Ljava/util/List; (greylist, reflection, allowed)
W/le.icse_quizap( 3174): Accessing hidden field Ldalvik/system/DexPathList;->systemNativeLibraryDirectories:Ljava/util/List; (greylist, reflection, allowed)        
W/le.icse_quizap( 3174): Accessing hidden field Ldalvik/system/DexPathList;->nativeLibraryPathElements:[Ldalvik/system/DexPathList$NativeLibraryElement; (greylist, reflection, allowed)
W/le.icse_quizap( 3174): Accessing hidden method Ldalvik/system/DexPathList;->makePathElements(Ljava/util/List;)[Ldalvik/system/DexPathList$NativeLibraryElement; (greylist, reflection, allowed)
V/NativeCrypto( 3174): Registering com/google/android/gms/org/conscrypt/NativeCrypto's 286 native methods...
W/le.icse_quizap( 3174): Accessing hidden method Ljava/security/spec/ECParameterSpec;->getCurveName()Ljava/lang/String; (greylist, reflection, allowed)
I/ProviderInstaller( 3174): Installed default security provider GmsCore_OpenSSL
W/le.icse_quizap( 3174): Accessing hidden field Ljava/net/Socket;->impl:Ljava/net/SocketImpl; (greylist, reflection, allowed)
W/le.icse_quizap( 3174): Accessing hidden method Ldalvik/system/CloseGuard;->get()Ldalvik/system/CloseGuard; (greylist,core-platform-api, linking, allowed)
W/le.icse_quizap( 3174): Accessing hidden method Ldalvik/system/CloseGuard;->open(Ljava/lang/String;)V (greylist,core-platform-api, linking, allowed)
W/le.icse_quizap( 3174): Accessing hidden field Ljava/io/FileDescriptor;->descriptor:I (greylist, JNI, allowed)
W/le.icse_quizap( 3174): Accessing hidden method Ljava/security/spec/ECParameterSpec;->setCurveName(Ljava/lang/String;)V (greylist, reflection, allowed)
W/le.icse_quizap( 3174): Accessing hidden method Ldalvik/system/BlockGuard;->getThreadPolicy()Ldalvik/system/BlockGuard$Policy; (greylist,core-platform-api, linking, allowed)
W/le.icse_quizap( 3174): Accessing hidden method Ldalvik/system/BlockGuard$Policy;->onNetwork()V (greylist, linking, allowed)

有人可以帮助我并告诉我出了什么问题吗？

编辑：我在 Android Studio 上使用 Pixel 模拟器。我已经确保安装了 Google Play 服务，没有可用的更新，我已经确保<uses-permission android:name="android.permission.INTERNET" />每个 AndroidManifest.xml 文件中都有，并且主文件中也有<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />，在我的 build.gradle 中我有以下内容：

minSdkVersion 30
targetSdkVersion 21
multiDexEnabled true

我通过打开和关闭模拟器 Wi-Fi 和移动数据解决了这个问题。