Fatal error: Uncaught ArgumentCountError: Too few arguments to function WP_Widget::__construct(), 0 passed in /homepages/21/d123438236/htdocs/blog/wp-includes/class-wp-widget-factory.php on line 71 and at least 2 expected in /homepages/21/d123438236/htdocs/blog/wp-includes/class-wp-widget.php:162 Stack trace: #0 /homepages/21/d123438236/htdocs/blog/wp-includes/class-wp-widget-factory.php(71): WP_Widget->__construct() #1 /homepages/21/d123438236/htdocs/blog/wp-includes/widgets.php(115): WP_Widget_Factory->register('Twenty_Eleven_E...') #2 /homepages/21/d123438236/htdocs/blog/wp-content/themes/twentyeleven/functions.php(371): register_widget('Twenty_Eleven_E...') #3 /homepages/21/d123438236/htdocs/blog/wp-includes/class-wp-hook.php(288): twentyeleven_widgets_init('') #4 /homepages/21/d123438236/htdocs/blog/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(NULL, Array) #5 /homepages/21/d123438236/htdocs/blog/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #6 /homepages/21/d123438236/htdocs/blog/wp-includes/widgets.php(1765): do_action('widgets_init') #7 /homepages/21/d123438236/htdocs/blog/wp-includes/class-wp-hook.php(288): wp_widgets_init('') #8 /homepages/21/d123438236/htdocs/blog/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(NULL, Array) #9 /homepages/21/d123438236/htdocs/blog/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #10 /homepages/21/d123438236/htdocs/blog/wp-settings.php(523): do_action('init') #11 /homepages/21/d123438236/htdocs/blog/wp-config.php(90): require_once('/homepages/21/d...') #12 /homepages/21/d123438236/htdocs/blog/wp-load.php(37): require_once('/homepages/21/d...') #13 /homepages/21/d123438236/htdocs/blog/wp-blog-header.php(13): require_once('/homepages/21/d...') #14 /homepages/21/d123438236/htdocs/blog/index.php(17): require('/homepages/21/d...') #15 {main} thrown in /homepages/21/d123438236/htdocs/blog/wp-includes/class-wp-widget.php on line 162