Ticket #21413: 21413.5.patch

wp-admin/admin-header.php

@@ -100 +100 @@
 <?php
 // If the customize-loader script is enqueued, make sure the customize
 // body classes are correct as early as possible.
-if ( wp_script_is( 'customize-loader', 'queue' ) && current_user_can( 'edit_theme_options' ) )
+if ( current_user_can( 'edit_theme_options' ) )
         wp_customize_support_script();
 ?>