title: Swagger UI does not display image/png content in POST
body: <p>I have a scenario where POST method returns an "image/png" content. The API works perfectly in Postman and I am able to see an image. </p>
  
  <p>I use Swagger to document my APIs. For some reason "Try out" functionality crashes any POST method which returns an image. It freeze on loading and I see the following in the browser console:</p>
  
  <pre><code>cannot parse JSON/YAML content 
  swagger-ui-min-js:14 Uncaught TypeError: Failed to execute 'createObjectURL' on 'URL': No function was found that matched the signature provided.
  at C.n.showStatus (swagger-ui-min-js:14)
  at showCompleteStatus (swagger-ui-min-js:14)
  at response (swagger-ui-min-js:9)
  at h (swagger-ui-min-js:7)
  at t.on.response (swagger-ui-min-js:7)
  at swagger-ui-min-js:7
  at h.callback (swagger-ui-min-js:13)
  at h.&lt;anonymous&gt; (swagger-ui-min-js:13)
  at h.r.emit (swagger-ui-min-js:13)
  at XMLHttpRequest.n.onreadystatechange (swagger-ui-min-js:13)
  </code></pre>
  
  <p>Any ideas of how this could be fixed? The API works (at least in Postman), it is just the Swagger UI which seems to have a problem.
  I installed Swagger via nuget packages Swashbuckle.Core and Swashbuckle version 5.6.0</p>