wp-config.php
должен быть код// Determine HTTP or HTTPS, then set WP_SITEURL and WP_HOME
if (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443)
{
$protocol_to_use = 'https://';
} else {
$protocol_to_use = 'http://';
}
define( 'WP_SITEURL', $protocol_to_use . $_SERVER['HTTP_HOST']);
define( 'WP_HOME', $protocol_to_use . $_SERVER['HTTP_HOST']);
$protocol_to_use = "http://"
// Smooth Scrolling Function