title: Odoo Client Error Error: QWeb2: Template 'mail.chat.MessagingMenu' not found
body: <p>When I trying to upgrade my application error occurs.<a href="https://i.stack.imgur.com/AiYMW.png" rel="nofollow noreferrer">enter image description here</a>
  What is the Solution for it ??</p>
  
  <p>I can't able to fix this error .
  Plz give me the solution ...</p>