title: SSL context service in apache nifi
body: <p>Good morning everyone
  I made an apache Nifi project where I use GetHttp and PostHttp. The thing is that an error is occurring: <a href="https://i.stack.imgur.com/6MxjN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6MxjN.png" alt="Error capture"></a> 
  I looked for it on google but I did not understand exactly what to do? what is SSL cert? how to add it?
  <a href="https://i.stack.imgur.com/V9HJ6.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/V9HJ6.png" alt="Configure Controller Service"></a></p>