There has been a critical error on this website.

HELP

I have 2 sites with the same problem, I have debuged one with this result:

Fatal error: Uncaught ArgumentCountError: Too few arguments to function WP_Widget::__construct(), 0 passed in /customers/9/4/d/pj-tec.dk/httpd.www/wp-includes/class-wp-widget-factory.php on line 61 and at least 2 expected in /customers/9/4/d/pj-tec.dk/httpd.www/wp-includes/class-wp-widget.php:162 Stack trace: #0 /customers/9/4/d/pj-tec.dk/httpd.www/wp-includes/class-wp-widget-factory.php(61): WP_Widget->__construct() #1 /customers/9/4/d/pj-tec.dk/httpd.www/wp-includes/widgets.php(115): WP_Widget_Factory->register('Weaverii_Widget...') #2 /customers/9/4/d/pj-tec.dk/httpd.www/wp-content/themes/weaver-ii/includes/widgets.php(170): register_widget('Weaverii_Widget...') #3 /customers/9/4/d/pj-tec.dk/httpd.www/wp-includes/class-wp-hook.php(303): weaverii_load_widgets('') #4 /customers/9/4/d/pj-tec.dk/httpd.www/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters(NULL, Array) #5 /customers/9/4/d/pj-tec.dk/httpd.www/wp-includes/plugin.php(470): WP_Hook->do_action(Array) #6 /customers/9/4/d/pj-tec.dk/httpd.www/wp-includes/widgets.php(1809): do_action('widgets_init') #7 /customers/9/4/d/pj-tec.dk/httpd.www/wp-includes/class-wp-hook.php(303): wp_widgets_init('') #8 /customers/9/4/d/pj-tec.dk/httpd.www/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters(NULL, Array) #9 /customers/9/4/d/pj-tec.dk/httpd.www/wp-includes/plugin.php(470): WP_Hook->do_action(Array) #10 /customers/9/4/d/pj-tec.dk/httpd.www/wp-settings.php(578): do_action('init') #11 /customers/9/4/d/pj-tec.dk/httpd.www/wp-config.php(90): require_once('/customers/9/4/...') #12 /customers/9/4/d/pj-tec.dk/httpd.www/wp-load.php(50): require_once('/customers/9/4/...') #13 /customers/9/4/d/pj-tec.dk/httpd.www/wp-blog-header.php(13): require_once('/customers/9/4/...') #14 /customers/9/4/d/pj-tec.dk/httpd.www/index.php(17): require('/customers/9/4/...') #15 {main} thrown in /customers/9/4/d/pj-tec.dk/httpd.www/wp-includes/class-wp-widget.php on line 162

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