title: Visual Studio - Nuget - Unable to load the service index for source
body: <p>This is my NuGet.config : </p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;configuration&gt;
     &lt;packageSources&gt;
        &lt;add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" /&gt;
     &lt;/packageSources&gt;
     &lt;disabledPackageSources&gt;
        &lt;add key="Microsoft and .NET" value="true" /&gt;
     &lt;/disabledPackageSources&gt;
  &lt;/configuration&gt;
  </code></pre>
  
  <p>Now, in Visual Studio, when I try to install 'geckofx45' package, I get the following error : </p>
  
  <blockquote>
    <p>install-package geckofx45
        install-package : Unable to load the service index for source <a href="https://api.nuget.org/v3/index.json" rel="noreferrer">https://api.nuget.org/v3/index.json</a>.
        At line:1 char:1
        + install-package geckofx45
        + ~~~~~~~~~~~~~~~~~~~~~~~~~
        + CategoryInfo          : NotSpecified: (:) [Install-Package], Exception
        + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand</p>
  </blockquote>
  
  <p>Do you have any solutions ?</p>
  
  <p>Thank you in advance</p>