title: Swagger..Unable to render this definition The provided definition does not specify a valid version field
body: <blockquote>
    <p>Unable to render this definition The provided definition does not
    specify a valid version field.</p>
    
    <p>Please indicate a valid Swagger or OpenAPI version field. Supported
    version fields are swagger: "2.0" and those that match  openapi: 3.0.n
    (for example, openapi: 3.0.0).</p>
  </blockquote>
  
  <p>Where do I need to insert the correct version to the stop the error below.
  Swagger editor works ok, but when launching a particular project I receive this error.First time using Swagger.
  Many Thanks</p>