title: Nuget and "Unable to load the service index"
body: <p>I'm having a trouble with Monodevelop. I'm using LinuxMint Serena (18.1) and Monodevelop 7.0.1 (build 24). When trying to add nuget package on a new project, I get the next answer:</p>
  
  <pre><code>[nuget.org] Unable to load the service index for source https://api.nuget.org/v3/index.json. An error occurred while sending the request
  Error: SecureChannelFailure (Object reference not set an instance of an object) Object reference not set to an instance of an object
  </code></pre>
  
  <p>I check the api nuget address and is normal, nothing strange about the link. I tried to copy the old package from the original Visual Studio project but remain the problem.</p>
  
  <p>Thanks in advance.</p>
  
  <p>EDIT:
  After trying many things with no success, I use the old nuget packages downloaded from the old Visual Studio project. I don't know if making that works or the fact that I take the project and open it up with Monodevelop for Windows fixed the issue. </p>