Fatal error: Uncaught Error: Class "WP_Widget" not found in /usr/home/sportbar/public_html/sport-bar/bar/wp-includes/widgets/class-wp-widget-calendar.php:17
Stack trace:
#0 {main}
  thrown in /usr/home/sportbar/public_html/sport-bar/bar/wp-includes/widgets/class-wp-widget-calendar.php on line 17