Fatal error: Uncaught Error: Class 'WP_Widget' not found in /home/refref/public_html/wp-includes-20250406223650-20250409105509/widgets/class-wp-widget-categories.php:17 Stack trace: #0 {main} thrown in /home/refref/public_html/wp-includes-20250406223650-20250409105509/widgets/class-wp-widget-categories.php on line 17