diff --git a/wp-admin/includes/class-wp-upgrader.php b/wp-admin/includes/class-wp-upgrader.php
index 69ba518328..1fbfa99e4c 100644
--- a/wp-admin/includes/class-wp-upgrader.php
+++ b/wp-admin/includes/class-wp-upgrader.php
@@ -1207,8 +1207,7 @@ class WP_Upgrader {
 			if ( ! $wp_filesystem->delete( $temp_backup_dir, true ) ) {
 				$errors->add(
 					'temp_backup_delete_failed',
-					sprintf( $this->strings['temp_backup_delete_failed'] ),
-					$args['slug']
+					sprintf( $this->strings['temp_backup_delete_failed'], $args['slug'] )
 				);
 				continue;
 			}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 297e04ab42..82045a4499 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.4-alpha-56549';
+$wp_version = '6.4-alpha-56550';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.