diff --git a/wp-content/themes/twentyseventeen/assets/js/global.js b/wp-content/themes/twentyseventeen/assets/js/global.js
index 9b4db2353b..966889233c 100644
--- a/wp-content/themes/twentyseventeen/assets/js/global.js
+++ b/wp-content/themes/twentyseventeen/assets/js/global.js
@@ -111,7 +111,9 @@
 	function belowEntryMetaClass( param ) {
 		var sidebarPos, sidebarPosBottom;
 
-		if ( ! $body.hasClass( 'has-sidebar' ) || (
+		if ( ! $body.hasClass( 'has-sidebar' ) ||
+			typeof $sidebar === 'undefined' ||
+			$sidebar.length < 1 || (
 			$body.hasClass( 'search' ) ||
 			$body.hasClass( 'single-attachment' ) ||
 			$body.hasClass( 'error404' ) ||
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 4a0a89254b..6ea8602c0c 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.8-beta4-51256';
+$wp_version = '5.8-beta4-51257';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.