title: CSS not loading in WKWebView
body: <p>I am trying to create a simple WebView app using UITabBarViewController. The CSS does not load when I use Tab Bar. If I use a simple View Controller, the CSS loads. There are no other changes to the code.<img src="https://i.stack.imgur.com/l6Ob2.png" alt="enter image description here"><img src="https://i.stack.imgur.com/zTxV7.jpg" alt="enter image description here"></p>
  
  <pre><code>let request: NSMutableURLRequest = NSMutableURLRequest(url: myUrl)
  
      if (webView != nil) {
  
      } else {
          self.loadView()
          self.webView.navigationDelegate = self
      }
      if (self.finishedUrl != myUrl.absoluteString) {
          webView.load(request as URLRequest)
      }
  </code></pre>