Faced such a problem: after activating the plugin - the site below the header does not want to load. I deactivate - everything works again. File header.php:
<head> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta charset="utf-8"> <title> <?php wp_title(''); ?> </title> <?php wp_head(); ?> </head> Styles that are registered in function.php are not connected.
