Fatal error: Uncaught Error: Class 'WP_Widget' not found in /nfs/aesop1/hw00/d45/pbslab/wordpress/wp-content/plugins/contact-form-maker/admin/controllers/Widget.php:6 Stack trace: #0 {main} thrown in /nfs/aesop1/hw00/d45/pbslab/wordpress/wp-content/plugins/contact-form-maker/admin/controllers/Widget.php on line 6