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Flutter crash report.
Please report a bug at https://github.com/flutter/flutter/issues.

## command

flutter run

## exception

ExistingDartDevelopmentServiceException: DartDevelopmentServiceException: JSON-RPC error 100: Existing VM service clients prevent DDS from taking control.

```
```

## flutter doctor

```
[✓] Flutter (Channel stable, 3.27.4, on Microsoft Windows [version 10.0.22621.4317], locale fr-FR) [12,0s]
    • Flutter version 3.27.4 on channel stable at C:\Users\Grace\Documents\flutter_windows_3.27.3-stable\flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision d8a9f9a52e (5 months ago), 2025-01-31 16:07:18 -0500
    • Engine revision f73bfc4522
    • Dart version 3.7.0
    • DevTools version 2.42.2

[✓] Windows Version (11 Professionnel 64 bits, 22H2, 2009) [39,0s]

[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.1) [87,8s]
    • Android SDK at C:\Users\Grace\AppData\Local\Android\sdk
    • Platform android-35, build-tools 35.0.1
    • Java binary at: C:\Program Files\Android\Android Studio\jbr\bin\java
      This is the JDK bundled with the latest Android Studio installation on this machine.
      To manually set the JDK path, use: `flutter config --jdk-dir="path/to/jdk"`.
    • Java version OpenJDK Runtime Environment (build 21.0.4+-12508038-b607.1)
    • All Android licenses accepted.

[✓] Chrome - develop for the web [10ms]
    • Chrome at C:\Program Files (x86)\Google\Chrome\Application\chrome.exe

[✗] Visual Studio - develop Windows apps [9ms]
    ✗ Visual Studio not installed; this is necessary to develop Windows apps.
      Download at https://visualstudio.microsoft.com/downloads/.
      Please install the "Desktop development with C++" workload, including all of its default components

[✓] Android Studio (version 2024.2) [6ms]
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 21.0.4+-12508038-b607.1)

[✓] VS Code (version 1.101.1) [4ms]
    • VS Code at C:\Users\Grace\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.112.0

[✓] Connected device (3 available) [377ms]
    • Windows (desktop) • windows • windows-x64    • Microsoft Windows [version 10.0.22621.4317]
    • Chrome (web)      • chrome  • web-javascript • Google Chrome 137.0.7151.104
    • Edge (web)        • edge    • web-javascript • Microsoft Edge 137.0.3296.68

[!] Network resources [12,7s]
    ✗ An HTTP error occurred while checking "https://pub.dev/": Connection closed before full header was received
    ✗ An HTTP error occurred while checking "https://storage.googleapis.com/": Connection closed before full header was received
    ✗ An HTTP error occurred while checking "https://maven.google.com/": Connection closed before full header was received

! Doctor found issues in 2 categories.
```