diff --git a/wp-admin/edit-form-blocks.php b/wp-admin/edit-form-blocks.php
index c1c37487ef..3e4fd40e7f 100644
--- a/wp-admin/edit-form-blocks.php
+++ b/wp-admin/edit-form-blocks.php
@@ -125,7 +125,11 @@ $meta_box_url = add_query_arg(
 	),
 	$meta_box_url
 );
-wp_localize_script( 'wp-editor', '_wpMetaBoxUrl', $meta_box_url );
+wp_add_inline_script(
+	'wp-editor',
+	sprintf( 'var _wpMetaBoxUrl = %s;', wp_json_encode( $meta_box_url ) ),
+	'before'
+);
 
 
 /*
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 554cf7c8b3..a8fdb969ef 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.6-alpha-48840';
+$wp_version = '5.6-alpha-48841';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.