The method 'FlushbarRoute.install' has fewer positional arguments than those of overridden method 'OverlayRoute.install'.

[grandleaf]

Compiler message:
../../Development/flutter/.pub-cache/hosted/pub.dartlang.org/flushbar-1.10.0/lib/flushbar_route.dart:303:8: Error: The method 'FlushbarRoute.install' has fewer positional arguments than those of overridden method 'OverlayRoute.install'.
void install() {
^
../../Development/flutter/packages/flutter/lib/src/widgets/routes.dart:41:8: Context: This is the overridden method ('install').
void install(OverlayEntry insertionPoint) {
^
../../Development/flutter/.pub-cache/hosted/pub.dartlang.org/flushbar-1.10.0/lib/flushbar_route.dart:311:18: Error: Too few positional arguments: 1 required, 0 given.
super.install();
^
Target kernel_snapshot failed: Exception: Errors during snapshot creation: null
build failed.

FAILURE: Build failed with an exception.

[✓] Flutter (Channel stable, v1.12.13+hotfix.8, on Mac OS X 10.15.3 19D76, locale en-US)
• Flutter version 1.12.13+hotfix.8 at /Users/grandleaf/Development/flutter
• Framework revision 0b8abb4724 (7 weeks ago), 2020-02-11 11:44:36 -0800
• Engine revision e1e6ced81d
• Dart version 2.7.0

[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
• Android SDK at /Users/grandleaf/Library/Android/sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-29, build-tools 28.0.3
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
• All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.4)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 11.4, Build version 11E146
• CocoaPods version 1.8.4

[✓] Android Studio (version 3.5)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin version 43.0.1
• Dart plugin version 191.8593
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)

[✓] VS Code (version 1.43.2)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.8.1

[✓] Connected device (1 available)
• SM G988U1 • 10.0.0.174:5555 • android-arm64 • Android 10 (API 29)

• No issues found!

[AndreHaueisen]

Read the changelog

[DevarshRanpara]

Which version's changlog can you please tell us @AndreHaueisen

[omar-khaium]

try flushbar: 1.6.0
It workes for me. Also, check the changelogs for the compatible version for you.