Ticket #42184: 42184.0.diff

src/wp-includes/class-wp-customize-manager.php

@@ -402 +402 @@
                 if ( current_user_can( 'install_themes' ) || current_user_can( 'update_themes' ) ) {
                         require_once ABSPATH . '/wp-admin/includes/update.php';
                         add_action( 'customize_controls_print_footer_scripts', 'wp_print_admin_notice_templates' );
+                        add_action( 'customize_controls_print_footer_scripts', 'wp_print_request_filesystem_credentials_modal' );
                 }
         }