title: "Chrome extension throws CRX file Error "CRX_REQUIRD_PROOF_MISSING"
body: <p>I have Chrome extension and create the <code>crx</code> file using developer mode. I uploaded the <code>crx</code> file to some internal url (www.xyz.com/internal.crx). </p>
  
  <p>Whenever i am trying to install the extension with URL (not in developer mode) it is throwing error Package is invalid:</p>
  
  <blockquote>
    <p>CRX_REQUIRD_PROOF_MISSING</p>
  </blockquote>
  
  <p>Same <code>CRX</code> file i used in developer mode with drag and drop and it's working fine. Please help to solve the problem with URL downloading and installing extension internally.</p>