title: SwiftUI / Xcode Error - Updating took more than 5 seconds
body: <p>When I try to preview one of my views in the canvas I keep getting the following error:</p>
  
  <blockquote>
    <p>PreviewUpdateTimedOutError: Updating took more than 5 seconds</p>
  </blockquote>
  
  <p>All my other views load perfectly fine.</p>
  
  <p>Why is this happening and how do I resolve?</p>
  
  <p>I am using SwiftUI in Xcode 11.4 (public release)</p>