I am unable to upgrade flutter with following error:

Process Exception: Process exited abnormally: fatal: unable to access 'https://github.com/flutter/flutter.git/': Failed to connect to github.com port 443: Bad access Command: git fetch --tags

When I run flutter doctor -v, I get following:

[√] Flutter (Channel stable, 2.10.2, on Microsoft Windows [Version 10.0.22000.493], locale en-IN)
    • Flutter version 2.10.2 at F:\flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 097d3313d8 (2 days ago), 2022-02-18 19:33:08 -0600
    • Engine revision a83ed0e5e3
    • Dart version 2.16.1
    • DevTools version 2.9.2

[√] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
    • Android SDK at F:/androidsdk
    • Platform android-31, build-tools 30.0.2
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 11.0.11 9-b60-7590822)
    • All Android licenses accepted.

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

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

[√] Android Studio (version 2021.1)
    • 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 11.0.11 9-b60-7590822)

[√] VS Code (version 1.49.3)
    • VS Code at C:\Users\Anirban\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.15.0

[√] Connected device (3 available)
    • Windows (desktop) • windows • windows-x64    • Microsoft Windows [Version 10.0.22000.493]
    • Chrome (web)      • chrome  • web-javascript • Google Chrome 98.0.4758.102
    • Edge (web)        • edge    • web-javascript • Microsoft Edge 98.0.1108.56

[!] HTTP Host Availability
    X HTTP host https://maven.google.com/ is not reachable. Reason: An error occurred while checking the HTTP host: A
      request to send or receive data was disallowed because the socket is not connected and (when sending on a datagram      socket using a sendto call) no address was supplied.

    X HTTP host https://pub.dev/ is not reachable. Reason: An error occurred while checking the HTTP host: A request to
      send or receive data was disallowed because the socket is not connected and (when sending on a datagram socket
      using a sendto call) no address was supplied.

    X HTTP host https://cloud.google.com/ is not reachable. Reason: An error occurred while checking the HTTP host: A
      request to send or receive data was disallowed because the socket is not connected and (when sending on a datagram      socket using a sendto call) no address was supplied.


! Doctor found issues in 2 categories.

How do I solve this problem? I have Bitdefender installed on my system - is it possible that Bitdefender is blocking something?

CodePudding user response：

Here are some points to check:

• Disable Antivirus or some defender software
• Allow firewall
• check for other requred dependency/dependencies to be installed properly (not neccessary)
• clear cache
• delete .lockfile (sometime it needs to be deleted)
• use --force flag to upgrade sdk. i.e., flutter upgrade --force

CodePudding user response：

This is resolved. Bitdefender was blocking Flutter. Thanks everyone.