ignore NoNullnessRewrite in proguard-rules.pro

android/app/proguard-rules.pro

@@ -7,6 +7,7 @@
 -keep class io.flutter.plugins.**  { *; }
 -dontwarn io.flutter.embedding.**
 -dontwarn com.google.android.play.core.splitcompat.SplitCompatApplication
+-dontwarn com.google.android.gms.common.annotation.NoNullnessRewrite
 
 # start reown
 -dontwarn com.github.luben.zstd.BufferPool

lib/view_model/dashboard/balance_view_model.dart

@@ -54,7 +54,7 @@ abstract class BalanceViewModelBase with Store {
   BalanceViewModelBase(
       {required this.appStore, required this.settingsStore, required this.fiatConvertationStore})
       : isReversing = false,
-        isShowCard = appStore.wallet!.walletInfo.isShowIntroCakePayCard,
+        isShowCard = appStore.wallet?.walletInfo.isShowIntroCakePayCard ?? false,
         wallet = appStore.wallet! {
     reaction((_) => appStore.wallet, (wallet) {
       _onWalletChange(wallet);