Ticket #31139: 31139.4.diff

src/wp-includes/js/tinymce/plugins/wpview/plugin.js

@@ -194 +194 @@
                                 }
                         } );
 
-                        if ( node.nodeName !== 'P' || trim( node.textContent || node.innerText ) ) {
+                        if ( node && ( node.nodeName !== 'P' || trim( node.textContent || node.innerText ) ) ) {
                                 return;
                         }
                 }