title: Odoo Warning - The requested operation cannot be completed due to security restrictions
body: <p>When a POS user logins and try to access his allowed POS session, a warning is displayed: </p>
  
  <pre><code>The requested operation cannot be completed due to security restrictions. Please contact your system administrator. (Document type: pos.config, Operation: read)  
  </code></pre>
  
  <p>Why is it so? How to rectify it? </p>