WPLESS problem loading a page from SSL

Hello there,

I am having a website that in the checkout form I am using SSL but in all other pages I don’t.

I have these functions:

function vm_ssl_template_redirect() {

  $id = _THE_CHECKOUT_PAGE_ID

  if ( is_page( $id ) && ! is_ssl() ) {
    if ( 0 === strpos($_SERVER['REQUEST_URI'], 'http') ) {
      wp_redirect(preg_replace('|^http://|', 'https://', $_SERVER['REQUEST_URI']), 301 );
      exit();
    } else {
      wp_redirect('https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'], 301 );
      exit();
    }
  } else if ( !is_page( $id ) && is_ssl() && !is_admin() ) {
    if ( 0 === strpos($_SERVER['REQUEST_URI'], 'http') ) {
      wp_redirect(preg_replace('|^https://|', 'http://', $_SERVER['REQUEST_URI']), 301 );
      exit();
    } else {
      wp_redirect('http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'], 301 );
      exit();
    }
  }
}
add_action( 'template_redirect', 'vm_ssl_template_redirect', 1 );

function vm_checkout_page_ssl( $permalink, $post, $leavename ) {

	$id = _THE_CHECKOUT_PAGE_ID

	if ( $id == $post->ID )
		return preg_replace( '|^http://|', 'https://', $permalink );
	return $permalink;
}
add_filter( 'pre_post_link', 'vm_checkout_page_ssl', 10, 3 );

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The problem is when the page loads the I get this error that the style-xxxxxx.css file coming from wp-less plugin is coming from http and the problem is appearing in the console from both chrome and firefox. Can you please let me know how can we fix it? I cannot seem to find a filter there.

Thank you,

http://ww.wp.xz.cn/plugins/wp-less/