Error map
Cleartext HTTP traffic not permitted Flutter (Android): java.io.IOException: Cleartext HTTP traffic to api.example.com not permitted
Flutter / Dart · layer 1, On your device
Centre: this error. First ring: errors it is linked with (12). Outer ring: what those are linked with. Colours show the layer of a request each error belongs to. Click any dot to re-centre the map on it; hover to follow its connections. The centre dot opens the error page.
Directly related (12)
Error Domain=NSURLErrorDomain Code=-1001 "The request timed out."
The server didn’t respond within URLSession’s timeout (60 s default) — slow server, unreachable host on this network, or a stalle…
Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline."
URLSession couldn’t reach the network — the device is offline, the app’s cellular data is disabled, or the simulator lost network…
android.os.NetworkOnMainThreadException
The app made a network call on the main (UI) thread, which Android forbids.
Flutter: PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 10: , null, null)
Google Sign-In failed on Android because the app's SHA-1 fingerprint or package name is not registered for the OAuth client.
Flutter: Error: Could not find the correct Provider<CartModel> above this Consumer<CartModel> Widget
A widget asked Provider for an object that is not above it in the widget tree.
Dart: HandshakeException: Handshake error in client (OS Error: CERTIFICATE_VERIFY_FAILED: unable to get local issuer certificate)
The app refused the server's TLS certificate because it is self-signed, expired, missing intermediates, or the device clock/CA st…
Android Gradle: Execution failed — Unsupported class file major version 65 / Android Gradle plugin requires Java 17 to run
Gradle or the Android Gradle plugin is running on a Java version it does not support.
Flutter: Incorrect use of ParentDataWidget. The ParentDataWidget Expanded(flex: 1) wants to apply ParentData of type FlexParentData to a RenderObject
A widget like `Expanded`, `Flexible`, `Positioned` or `TableCell` was placed under a parent that does not support it.
Flutter: RenderBox was not laid out: RenderFlex#a1b2c relayoutBoundary=up2 NEEDS-PAINT — Failed assertion: 'hasSize'
A widget was asked for its size or painted before layout finished, usually because a parent gave it unbounded or conflicting cons…
Flutter: Vertical viewport was given unbounded height. Viewports expand in the scrolling direction to fill their container
A scrollable (ListView, GridView) sits inside a parent that does not limit its height, so it tries to be infinitely tall.
Flutter: BoxConstraints forces an infinite width. These invalid constraints were provided to RenderStack's layout() function (TextField in a Row)
A widget that needs a finite width, like a `TextField` or `Container` with no size, was placed where the parent offers unlimited…
Flutter: No Material widget found. TextField widgets require a Material widget ancestor
A Material-design widget (TextField, ListTile, InkWell, Chip) was placed outside a `Scaffold`, `Material` or `Card`, so it has no…
Two steps away (32)
MySQL ERROR 2006 (HY000): MySQL server has gone away
The connection to MySQL was closed — usually by a timeout or a packet larger than `max_allowed_packet`.
HTTP 408 Request Timeout
The server closed the connection because the client took too long to send the complete request.
HTTP 499 Client Closed Request (Nginx)
Nginx-specific code logged when the client disconnected before the server finished responding.
App Transport Security has blocked a cleartext HTTP resource load
iOS blocked an `http://` request (or a weak-TLS HTTPS one) because App Transport Security requires secure connections.
ECS task stopped: CannotPullContainerError: pull image manifest has been retried ... / ref pull has been retried
The ECS task couldn’t pull its image — no network route to the registry, missing ECR permissions, or a wrong image tag.
Error response from daemon: network X not found
The container or Compose project refers to a Docker network that doesn’t exist (any more).
Error response from daemon: Pool overlaps with other one on this address space
Docker tried to create a network whose subnet clashes with an existing Docker network (or a VPN/host route).
driver failed programming external connectivity on endpoint: iptables: No chain/target/match by that name
Docker’s iptables rules were wiped (firewalld/ufw reload, iptables flush) while Docker was running, so it can’t publish ports.
Ingress returns "404 Not Found" / "default backend - 404" (ingress-nginx)
The ingress controller received the request but no Ingress rule matched the host/path, so it answered with its default backend.
Google Cloud: Error: Could not load the default credentials. Browse to https://cloud.google.com/docs/authentication/getting-started
The Google client library found no Application Default Credentials (ADC) on this machine or environment.
Flutter: MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_preferences)
Dart called a plugin's native method but the native side is not registered, usually because the app was not fully rebuilt after a…
Flutter: [core/no-app] No Firebase App '[DEFAULT]' has been created - call Firebase.initializeApp()
A Firebase service was used before `Firebase.initializeApp()` ran and completed.
TypeError: Cannot assign to read only property 'x' of object
Code tried to modify a frozen object, a getter-only property, or immutable state.
android.os.TransactionTooLargeException: data parcel size x bytes
Too much data was put into a Bundle/Intent/saved state, exceeding the ~1 MB Binder transaction buffer.
SwiftUI: Modifying state during view update, this will cause undefined behavior
A @State/@Published value was changed while SwiftUI was computing a view’s body.
Flutter: Unhandled Exception: SocketException: Failed host lookup: 'api.example.com' (OS Error: No address associated with hostname, errno = 7)
The app could not resolve or reach the server: no internet, wrong host name, DNS failure, or missing network permission.
Flutter: Exception caught by image resource service — NetworkImageLoadException: HTTP request failed, statusCode: 404, https://example.com/a.png
`Image.network` could not download the image (bad URL, status error, or blocked by CORS on web).
iOS: The resource could not be loaded because the App Transport Security policy requires the use of a secure connection (NSURLErrorDomain -1022)
iOS blocks plain HTTP connections by default unless the domain is allowed in `Info.plist`.
Gradle: Could not resolve all files for configuration / Could not resolve dependency
Gradle couldn’t download a dependency — wrong coordinates/version, missing repository, offline mode, or network/proxy issues.
Manifest merger failed: android:exported needs to be explicitly specified
Targeting Android 12 (API 31)+ requires `android:exported` on every activity, service or receiver that has an intent-filter.
Duplicate class X found in modules A and B
Two dependencies ship the same class — typically old Android Support libraries mixed with AndroidX, or Kotlin stdlib-jdk7/jdk8 ve…
Jetpack Compose: Vertically scrollable component was measured with an infinity maximum height constraints, which is disallowed
A LazyColumn (or verticalScroll) is placed inside another vertically scrolling container, so it gets infinite height.
Flutter: A RenderFlex overflowed by x pixels on the right/bottom
A Row or Column’s children need more space than available, so Flutter draws the yellow-black overflow stripes.
Flutter: There are multiple heroes that share the same tag within a subtree
Two `Hero` widgets with the same tag exist on one screen during a route transition.
flutter doctor: Android license status unknown. Run `flutter doctor --android-licenses` to accept the SDK licenses
The Android SDK licenses have not been accepted, so builds cannot download or use SDK components.
Android Gradle: Execution failed for task ':app:checkDebugAarMetadata'. Dependency requires libraries and applications that depend on it to compile against version 34 or later of the Android APIs
A dependency was built against a newer Android API than your project's `compileSdk`.
Flutter: Scaffold.of() called with a context that does not contain a Scaffold
You called `Scaffold.of(context)` (or `ScaffoldMessenger`) using the same `BuildContext` that created the Scaffold, which is abov…
Flutter: Looking up a deactivated widget's ancestor is unsafe. At this point the state of the widget's element tree is no longer stable
You used a `BuildContext` after its widget was removed from the tree — typically after an `await` when the user already navigated…
Flutter: setState() or markNeedsBuild() called during build. This widget cannot be marked as needing to build because the framework is already in the process of building widgets
State was changed while Flutter was building widgets, for example calling `setState` or a notifier from inside `build`.
Flutter: MediaQuery.of() called with a context that does not contain a MediaQuery
Code asked for screen size or theme data using a context that has no MediaQuery ancestor, usually above or outside `MaterialApp`.
Flutter: Navigator operation requested with a context that does not include a Navigator
`Navigator.push/pop` was called with a context above the `MaterialApp`, so no Navigator exists in the lookup path.
Flutter test: Expected: exactly one matching candidate Actual: _TextFinder:<Found 0 widgets with text "Hello">
A widget test looked for a widget that is not currently in the tree.
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