Flutter Troubleshooting
Find solutions to common Flutter, Dart, Firebase, Android, and iOS problems.
Browse by Category
Flutter
Widget errors, layout overflows, lifecycle and async-state problems.
2 solutions
Android
Gradle, Android Manifest, SDK, and Kotlin/Java build problems.
1 solution
iOS
CocoaPods, Xcode, signing, and provisioning problems.
1 solution
Firebase
Auth, Firestore, Cloud Messaging, and configuration errors.
1 solution
Dart
Null safety, type errors, and async/await problems.
0 solutions
Networking
HTTP errors, timeouts, SSL, and JSON parsing problems.
0 solutions
Build & Release
Release-only failures, R8/ProGuard, and signing problems.
1 solution
Performance
Slow apps, jank, excessive rebuilds, and memory problems.
0 solutions
Popular Flutter Problems
Running flutter build ios, flutter run on an iOS device/simulator, or pod install inside the ios/ directory fails with a CocoaPods dependency error.
Flutter CocoaPods Error: Common Causes and Fixes
The app runs correctly with flutter run (debug mode) but crashes, behaves incorrectly, or fails to build entirely in release mode (flutter build apk --release, flutter build ipa, or flutter run --release).
Flutter App Works in Debug but Fails in Release
Push notifications sent via Firebase Cloud Messaging (FCM) aren't being received on an Android or iOS device running a Flutter app, even though the send appears to succeed from the Firebase Console or backend.
Firebase Messaging Not Working in Flutter
Running `flutter build apk`, `flutter build appbundle`, or launching on an Android device fails during the Gradle build phase, often with a message like `Execution failed for task ':app:...'` or `Build failed with an exception.`
Flutter Gradle Build Failed: Common Causes and Fixes
An asynchronous operation (a network call, a Future, a Timer, a stream callback) completes and calls setState() after the widget that started it has already been removed from the widget tree.
Flutter setState Called After Dispose: How to Fix It
A Row, Column, or other Flex-based widget renders content that doesn't fit within the space available to it, and Flutter shows a yellow-and-black striped overflow warning in debug mode.
Flutter RenderFlex Overflowed by Pixels: How to Fix It
Latest Troubleshooting Guides
Running flutter build ios, flutter run on an iOS device/simulator, or pod install inside the ios/ directory fails with a CocoaPods dependency error.
Flutter CocoaPods Error: Common Causes and Fixes
The app runs correctly with flutter run (debug mode) but crashes, behaves incorrectly, or fails to build entirely in release mode (flutter build apk --release, flutter build ipa, or flutter run --release).
Flutter App Works in Debug but Fails in Release
Push notifications sent via Firebase Cloud Messaging (FCM) aren't being received on an Android or iOS device running a Flutter app, even though the send appears to succeed from the Firebase Console or backend.
Firebase Messaging Not Working in Flutter
Running `flutter build apk`, `flutter build appbundle`, or launching on an Android device fails during the Gradle build phase, often with a message like `Execution failed for task ':app:...'` or `Build failed with an exception.`
Flutter Gradle Build Failed: Common Causes and Fixes
An asynchronous operation (a network call, a Future, a Timer, a stream callback) completes and calls setState() after the widget that started it has already been removed from the widget tree.
Flutter setState Called After Dispose: How to Fix It
A Row, Column, or other Flex-based widget renders content that doesn't fit within the space available to it, and Flutter shows a yellow-and-black striped overflow warning in debug mode.