Fatal error: Uncaught Error: Class 'WP_Widget_Calendar' not found in /home/mesmar/public_html/cms/wp-includes/class-wp-widget-factory.php:106 Stack trace: #0 /home/mesmar/public_html/cms/wp-includes/widgets.php(113): WP_Widget_Factory->register('WP_Widget_Calen...') #1 /home/mesmar/public_html/cms/wp-includes/widgets.php(1444): register_widget('WP_Widget_Calen...') #2 /home/mesmar/public_html/cms/wp-includes/class-wp-hook.php(298): wp_widgets_init('') #3 /home/mesmar/public_html/cms/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(NULL, Array) #4 /home/mesmar/public_html/cms/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #5 /home/mesmar/public_html/cms/wp-settings.php(454): do_action('init') #6 /home/mesmar/public_html/cms/wp-config.php(94): require_once('/home/mesmar/pu...') #7 /home/mesmar/public_html/cms/wp-load.php(37): require_once('/home/mesmar/pu...') #8 /home/mesmar/public_html/cms/wp-blog-header.php(46): require_once('/home/mesmar/pu...') #9 /home/mesmar/public_html/index.php(24): require('/home in /home/mesmar/public_html/cms/wp-includes/class-wp-widget-factory.php on line 106