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Visual Studio - Proxy Authentication Required - Connecting to packages.nuget.org

Since last week, I’ve been having trouble opening previous projects in Visual Studio. A small window keeps popping up asking for 'Proxy Authentication Required' (see image below). I’ve tried nearly everything, including reinstalling Visual Studio, but nothing seems to work.

Any idea how to solve this?

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Solution

  • Are you able to install nuget packages if you add V3 Feed and uncheck V1 Feed in your package source?

    The V3 feed URL is https://api.nuget.org/v3/index.json

    The V1 feed URL is https://packages.nuget.org/v1/FeedService.svc

    Then please check if the NuGet.config file is configured for any proxy settings. For example:

      <v1>
     <add key="Username" value="xxx" />
     <add key="Password" value="xxx" />
  </v1>

    Docs Referred:

    https://learn.microsoft.com/en-us/nuget/reference/nuget-config-file#packagesourcecredentials

    https://learn.microsoft.com/en-us/nuget/consume-packages/consuming-packages-authenticated-feeds#credential-providers