title: wp-admin/admin-ajax.php 404 when adding media to article
body: <p>I'm struggling with this problem since a couple of days, I tried everything I found around but nothing seems to fix the problem.</p>
  
  <p>So, I created this wordpress website on my local machine and deployed it on a test server, untill there no problem, everything works as expected. Then I deployed the website to the prod server and everything works fine except that when I try to add an image to an article, the image isn't displayed and I get a 404 error on /wp-admin/admin-ajax.php. </p>
  
  <p>Unfortunately, the prod server is one of those crappy web hosting with cpanel that doesn't give you access to php error logs.</p>
  
  <p>Does someone know how to fix this problem?
  Thank you in advance.</p>