Fatal error: Uncaught Error: Class 'WP_Widget' not found in /usr/www/users/dalc/wp-content/plugins/jetpack/modules/widgets/milestone/class-milestone-widget.php:13 Stack trace: #0 {main} thrown in /usr/www/users/dalc/wp-content/plugins/jetpack/modules/widgets/milestone/class-milestone-widget.php on line 13