title: Cannot start Outlook web add-in
body: <p>I have an issue trying to load and debug any kind of Outlook web add-in.  I can reproduce with my own add-in (which is deployed to the Office store and used to work in debug mode perfectly!) as well as with the default add-in template in Visual Studio 2017.  I create a default "OutlookWebAddin1" project, change nothing, hit F5 to deploy and run/debug, enter my credentials, and load the add-in in the Outlook client or browser (Chrome, IE and Edge) - all exhibit the error:</p>
  
  <pre><code>"Add-in Error: Something went wrong and we couldn't start this add-in.  
  Please try again later or contact your system administrator."
  </code></pre>
  
  <p>The F12 console in Chrome (to pick one of the three browsers I tested with), shows these errors:</p>
  
  <pre><code>GET https://localhost:44398/MessageRead.html?et=&amp;_host_Info=
  Outlook|Web|16.01|en-CA|11aa92ad-a510-ddb9-c441-529b1b374f16| 
  net::ERR_INSECURE_RESPONSE
  GET https://localhost:44398/Images/icon64.png net::ERR_INSECURE_RESPONSE
  Executing action: GetTaskStatusAction
  GET https://outlook.office365.com/ows/outlookusersettings/api/v1/frepanel
  /frepaneltaskstatus 401 (Unauthorized)
  </code></pre>
  
  <p>Here's a prettier look at the error:</p>
  
  <p><a href="https://www.screencast.com/t/elcbcUkdlkO" rel="nofollow noreferrer">https://www.screencast.com/t/elcbcUkdlkO</a></p>