title: Amazon Lex recurring lambda function error
body: <p>I have been trying to make a lambda function for a Lex chatbot I'm making, but whenever my intent calls upon the function, it keeps giving me the same error and I am tired of it. I am using node.js. The error message it gives me is:</p>
  
  <pre><code>An error has occurred: Invalid Lambda Response: 
  Received invalid response from Lambda: Can not construct instance of
  IntentResponse: no String-argument constructor/factory method to
  deserialize from String value ('this works') at
  [Source: "this works"; line: 1, column: 1
  </code></pre>
  
  <p>This happens no matter what kind of lambda function I input. Any answers?</p>