I am getting my site ready for an update, but whenever I put my site in maintenance mode, all it does is remove all the CSS and images from the site and just shows the content.
Does anybody know what is happening?
Create a maintenance template file and place it in your theme folder. It's probably using a parent theme maintenance template or just the regular core one.
maintenance-page.tpl.php
(Drupal 7) ormaintenance-page.html.twig
(Drupal 8)?maintenance-page
template?