title: Resource temporarily unavailable. Authentication by key failed (Error -18). (Error #35)
body: <p>I'm using EC2 Amazon Web Service to launch my server using NodeJS, MongoDB.</p>
  
  <p>I completed to save and load the data using my android application through NodeJS server and MongoDB but when I tried to check the data using RoboMongo (Robo 3T), the error occurred.</p>
  
  <p>Resource temporarily unavailable. Authentication by key (path of the .pem key) failed (Error -18). (Error #35)</p>
  
  <p><a href="https://i.stack.imgur.com/t3dfr.png" rel="nofollow noreferrer">Robomongo 1</a></p>
  
  <p><a href="https://i.stack.imgur.com/5fxe1.png" rel="nofollow noreferrer">Robomongo 2</a></p>
  
  <p><a href="https://i.stack.imgur.com/rsH18.png" rel="nofollow noreferrer">Error dialog</a></p>
  
  <p>This is what I did in Robomongo.
  These are the result of searching the google... I think I did right...
  What is wrong?</p>