Fatal error: Uncaught Error: Class 'WP_Widget' not found in /home/bestelkoz/domains/bestelkozijn.com/public_html/wp-includes/widgets/class-wp-widget-pages.php:17 Stack trace: #0 /home/bestelkoz/domains/bestelkozijn.com/public_html/wp-includes/default-widgets.php(11): require_once() #1 /home/bestelkoz/domains/bestelkozijn.com/public_html/wp-includes/functions.php(3432): require_once('/home/bestelkoz...') #2 /home/bestelkoz/domains/bestelkozijn.com/public_html/wp-includes/plugin.php(525): wp_maybe_load_widgets('') #3 /home/bestelkoz/domains/bestelkozijn.com/public_html/wp-settings.php(237): do_action('plugins_loaded') #4 /home/bestelkoz/domains/bestelkozijn.com/public_html/wp-config.php(89): require_once('/home/bestelkoz...') #5 /home/bestelkoz/domains/bestelkozijn.com/public_html/wp-load.php(37): require_once('/home/bestelkoz...') #6 /home/bestelkoz/domains/bestelkozijn.com/public_html/wp-admin/install.php(36): require_once('/home/bestelkoz...') #7 {main} thrown in /home/bestelkoz/domains/bestelkozijn.com/public_html/wp-includes/widgets/class-wp-widget-pages.php on line 17