title: loadHTMLString is not loading images from a website
body: <p>I'm loading part of the HTML content of a website onto a <code>WKWebView</code>. The part I'm trying to load sometimes contains an image. Using</p>
  
  <pre><code>webView.loadHTMLString(url, baseURL: nil)
  </code></pre>
  
  <p>gives me the following image:</p>
  
  <p><a href="https://i.stack.imgur.com/0YjCR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/0YjCR.png" alt="The image is a screen shot of the WKWebView running a piece of the HTML (the HTML is coming from a website) on the simulator"></a></p>
  
  <p>Instead of the image being displayed a question mark is there.
  How do I fix this?</p>