title: WordPress Cannot save Permalink shows 404 error
body: <p>I have hosted a domain in Linux Apache 2.4.16 web server and installed WordPress in it. Now I cannot update Permalink from default <code>(date/time/%postname%/)</code> to <code>/%postname%/</code> or custom structure. Only Plain type gets saved. I am getting 404 error.</p>
  
  <blockquote>
    <blockquote>
      <p>404 Page not found</p>
    </blockquote>
  </blockquote>
  
  <p>I have cleared everything in the server contents, posts, plugins, even ssl too and remove and install WordPress,... But I am still getting the same error.</p>
  
  <p>Any suggestions?</p>
  
  <p><img src="https://i.stack.imgur.com/MZ5XV.jpg" alt="enter image description here"><img src="https://i.stack.imgur.com/MeQ1P.jpg" alt="enter image description here">
  <a href="https://i.stack.imgur.com/82QXR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/82QXR.png" alt="enter image description here"></a>
  <a href="https://i.stack.imgur.com/52MYy.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/52MYy.png" alt="enter image description here"></a></p>