title: I want to change the 404 page title of a wordpress theme
body: <p>I have a website that uses worpdress with <a href="https://wordpress.org/themes/catch-box/" rel="nofollow noreferrer">catch box  theme</a>, and I want to change the 404 page title.
  I looked for the "Nothing found for" sentence on the PHP files on the Editor but I did not find nothing.</p>
  
  <p>I searched for the get_header(); method in editor to change the title but I did not find it.</p>
  
  <p>see the title that I want to change
  <a href="https://i.stack.imgur.com/gJLui.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gJLui.png" alt="enter image description here"></a></p>