diff -u b/core/modules/ckeditor/js/ckeditor.js b/core/modules/ckeditor/js/ckeditor.js
--- b/core/modules/ckeditor/js/ckeditor.js
+++ b/core/modules/ckeditor/js/ckeditor.js
@@ -274,19 +274,21 @@
   });
 
   /**
-   * Pull the ID from the original textarea, that gets hidden. Specifically for jump-to
-   * links used with Inline Form Errors.
+   * Pull the ID from the original textarea, that gets hidden. Specifically for
+   * jump-to links used with Inline Form Errors.
    */
   function redirectTextareaFragmentToCKEditorInstance() {
     var hash = location.hash.substr(1);
     var element = document.getElementById(hash);
     if (element) {
       var editor = CKEDITOR.dom.element.get(element).getEditor();
-      var id = editor.container.getAttribute('id');
-      document.location.hash = '#' + id;
+      if (editor) {
+        var id = editor.container.getAttribute('id');
+        document.location.hash = '#' + id;
+      }
     }
   }
-  window.addEventListener('hashchange', redirectTextareaFragmentToCKEditorInstance);
+  $(window).on('hashchange', redirectTextareaFragmentToCKEditorInstance);
 
   // Set the CKEditor cache-busting string to the same value as Drupal.
   CKEDITOR.timestamp = drupalSettings.ckeditor.timestamp;