This type of error can be seen if Outlook is opened/closed after launching Application Server.  The workaround:

Don't open or close outlook after you start app server.

If outlook is already running when you start app server, leave it running

If outlook wasn't running when you start app server, don't try and open it after (let app server start it)

With exchange servers being hosted, this can become an issue should Outlook lose connectivity and need to be restarted.