Ticket #53512: 53512.patch

src/wp-content/themes/twentyseventeen/assets/js/global.js

@@ -111 +111 @@
         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' ) ||