Firebase Auth UI - ＆＃34;无法找到符合条件的帐户＆＃34;退出时出错

Question

我在Android项目中使用Firebase Auth UI（com.firebaseui:firebase-ui-auth:3.1.2）并在退出时收到以下错误：

01-30 22:08:39.730 8075-8075/com.ifeins.tenbis E/HomeActivity: signOut: Failed to sign out
java.util.concurrent.ExecutionException: 1 out of 2 underlying tasks failed
 at com.google.android.gms.tasks.Tasks$zzc.zzbjb(Unknown Source)
 at com.google.android.gms.tasks.Tasks$zzc.onFailure(Unknown Source)
 at com.google.android.gms.tasks.zzh.run(Unknown Source)
 at com.google.android.gms.tasks.zzm.execute(Unknown Source)
 at com.google.android.gms.tasks.zzg.onComplete(Unknown Source)
 at com.google.android.gms.tasks.zzl.zzb(Unknown Source)
 at com.google.android.gms.tasks.zzn.setException(Unknown Source)
 at com.google.android.gms.tasks.TaskCompletionSource.setException(Unknown Source)
 at com.google.android.gms.common.internal.zzbl.zzr(Unknown Source)
 at com.google.android.gms.common.api.internal.zzs.zzc(Unknown Source)
 at com.google.android.gms.common.api.internal.zzs.setResult(Unknown Source)
 at com.google.android.gms.internal.zzaul.setResult(Unknown Source)
 at com.google.android.gms.internal.zzauk.zze(Unknown Source)
 at com.google.android.gms.internal.zzaur.onTransact(Unknown Source)
 at android.os.Binder.execTransact(Binder.java:573)
Caused by: com.google.android.gms.common.api.ApiException: 16: No eligible accounts can be found
 at com.google.android.gms.common.internal.zzb.zzy(Unknown Source)
 at com.google.android.gms.common.internal.zzbk.zzz(Unknown Source)
 at com.google.android.gms.common.internal.zzbl.zzr(Unknown Source) 
 at com.google.android.gms.common.api.internal.zzs.zzc(Unknown Source) 
 at com.google.android.gms.common.api.internal.zzs.setResult(Unknown Source) 
 at com.google.android.gms.internal.zzaul.setResult(Unknown Source) 
 at com.google.android.gms.internal.zzauk.zze(Unknown Source) 
 at com.google.android.gms.internal.zzaur.onTransact(Unknown Source) 
 at android.os.Binder.execTransact(Binder.java:573) 

这是我用来执行退出的代码：

private void signOut() {
    AuthUI.getInstance()
            .signOut(this)
            .addOnCompleteListener((task) -> {
                if (task.isSuccessful()) {
                    User.setCurrentUser(null);
                    showSignInDialog();
                } else {
                    Log.e(TAG, "signOut: Failed to sign out", task.getException());
                }
            });
}

这是我用来执行登录的代码（请注意我禁用智能锁定）：

private void showSignInDialog() {
    List<AuthUI.IdpConfig> providers = Collections.singletonList(
            new AuthUI.IdpConfig.Builder(AuthUI.GOOGLE_PROVIDER).build()
    );

    Intent intent = AuthUI.getInstance()
            .createSignInIntentBuilder()
            .setIsSmartLockEnabled(false)
            .setAvailableProviders(providers)
            .build();
    startActivityForResult(intent, RC_SIGN_IN);
}

有什么我应该做的不同吗？