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processEscapes set to true doesn't work

Created by: parhizkari

using version 3.0.1, using "processEscapes" set to "true" stops MathJax from working, giving the error "TypeError: Q.setAttribute is not a function". The folloowing is the minimal example that I tested:

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <meta http-equiv="x-ua-compatible" content="ie=edge">
  <meta name="viewport" content="width=device-width">
  <title>MathJax v3 with TeX input and SVG output</title>
  <script>
  MathJax = {
    tex: {
    	inlineMath: [['$', '$']],
    	processEscapes: true
    },
    svg: {fontCache: 'global'}
  };
  </script>
  <script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-svg.js"></script>
</head>
<body>
    <h1>MathJax v3 beta: TeX input, HTML output test</h1>

    <p>
    When $a \ne 0$, there are two solutions to $ax^2 + bx + c = 0$ and they are
    $$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$
    \$equation\$
    </p>
</body>
</html>