title: How to identify the following problem given by Angular after production build?
body: <p>I have a large project in Angular and after production build (ng b --prod) and deployment it shows a white page and the following error:</p>
  
  <pre><code>Uncaught TypeError: Object prototype may only be an Object or null: undefined
      at setPrototypeOf (&lt;anonymous&gt;)
      at i (main.5a0de34ba4bae8cec104.js:1)
      at main.5a0de34ba4bae8cec104.js:1
      at Module.zUnb (main.5a0de34ba4bae8cec104.js:1)
      at f (runtime.26209474bfa8dc87a77c.js:1)
      at Object.1 (main.5a0de34ba4bae8cec104.js:1)
      at f (runtime.26209474bfa8dc87a77c.js:1)
      at t (runtime.26209474bfa8dc87a77c.js:1)
      at Array.r [as push] (runtime.26209474bfa8dc87a77c.js:1)
      at main.5a0de34ba4bae8cec104.js:1
  </code></pre>
  
  <p>I've published a few other projects like this and didn't have this kind of a problem.</p>