Ticket #60589: 60589.diff

src/js/_enqueues/wp/updates.js

@@ -3260 +3260 @@
                                 $message.text( message.text );
                         }
 
-                        if ( 'undefined' === typeof message.action || 'undefined' === typeof message.data.slug ) {
+                        if ( 'undefined' === typeof message.action ) {
                                 return;
                         }
 
@@ -3274 +3274 @@
 
                                 case 'install-plugin':
                                 case 'update-plugin':
+                                        if ( 'undefined' === typeof message.data || 'undefined' === typeof message.data.slug ) {
+                                                return;
+                                        }
+
                                         message.data = wp.updates._addCallbacks( message.data, message.action );
 
                                         wp.updates.queue.push( message );