title: Cannot read property 'querySelectorAll' of undefined
body: <p><img src="https://i.stack.imgur.com/TIcIW.png" alt=""> </p>
  
  <p>I receive this error on console Uncaught TypeError: Cannot read property 'querySelectorAll' of undefined ionic.bundle.js:2800 when i go from other view using ionic, but I don't know that is means, and how to solve it</p>