Fatal error: Uncaught Error: Class 'WP_Widget' not found in /home/wmichal67/public_html/lekcjatest-1v-mw/wp-includes/widgets/class-wp-widget-pages.php:17
Stack trace:
#0 {main}
thrown in /home/wmichal67/public_html/lekcjatest-1v-mw/wp-includes/widgets/class-wp-widget-pages.php on line 17