title: The location parameter is not a valid S3 uri - AWS::Include Location does not accept local path but S3 location
body: <p>When I try to provide the relative path of MyFileName.yaml as follows in my cloudformation template, I get the error - <strong>Transform AWS::Include failed with: The location parameter is not a valid S3 uri</strong></p>
  
  <pre><code>Fn::Transform:
    Name: AWS::Include
    Parameters:
      Location: ../MyFileName.yaml
  </code></pre>
  
  <p>I fixed it by uploading <strong>MyFileName.yaml</strong> in an S3 bucket and updating the template as follows:</p>
  
  <pre><code>Location: s3://&lt;bucket-name&gt;/MyFileName.yaml
  </code></pre>
  
  <p>However, I would like to know if it allows only S3 location and not local path. Please advise.</p>