title: Javascript - "Cannot read property 'closingEls' of undefined" and "Script error."
body: <p>I get the following errors in the JavaScript console with no file source hint:</p>
  
  <blockquote>
    <p>Uncaught TypeError: Cannot read property 'closingEls' of undefined</p>
  </blockquote>
  
  <p>and</p>
  
  <blockquote>
    <p>Script error</p>
  </blockquote>
  
  <p>These errors prevent my page from running scripts and I don't understand what kind of errors they are.</p>
  
  <p>I tried searching what 'closingEls' is, but no luck. I don't know what type of tags I need to put in this question due to the vague nature of these errors.</p>
  
  <p><strong>Edit 1:</strong> Please, before you say show us the code, read the question! my scripts do not run in the first place. And this errors does not come out of the site's scripts, it comes from the user's agent trying to load the page.</p>
  
  <p><strong>Edit 2:</strong> Please, advice a way to deal with the users having this errors and can not load the page successfully. I would consider this very helpful, constructive and question-related.</p>