Fatal error: Uncaught ArgumentCountError: Too few arguments to function WP_Widget::__construct(), 0 passed in /usr/www/users/daszfi/wp-includes/class-wp-widget-factory.php on line 62 and at least 2 expected in /usr/www/users/daszfi/wp-includes/class-wp-widget.php:163 Stack trace: #0 /usr/www/users/daszfi/wp-includes/class-wp-widget-factory.php(62): WP_Widget->__construct() #1 /usr/www/users/daszfi/wp-includes/widgets.php(123): WP_Widget_Factory->register() #2 /usr/www/users/daszfi/wp-content/plugins/ajax-calendar/ajax-calendar.php(141): register_widget() #3 /usr/www/users/daszfi/wp-includes/class-wp-hook.php(324): register_ajax_calendar_widget() #4 /usr/www/users/daszfi/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #5 /usr/www/users/daszfi/wp-includes/plugin.php(517): WP_Hook->do_action() #6 /usr/www/users/daszfi/wp-includes/widgets.php(1870): do_action() #7 /usr/www/users/daszfi/wp-includes/class-wp-hook.php(324): wp_widgets_init() #8 /usr/www/users/daszfi/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #9 /usr/www/users/daszfi/wp-includes/plugin.php(517): WP_Hook->do_action() #10 /usr/www/users/daszfi/wp-settings.php(727): do_action() #11 /usr/www/users/daszfi/wp-config.php(88): require_once('/usr/www/users/...') #12 /usr/www/users/daszfi/wp-load.php(50): require_once('/usr/www/users/...') #13 /usr/www/users/daszfi/wp-blog-header.php(13): require_once('/usr/www/users/...') #14 /usr/www/users/daszfi/index.php(17): require('/usr/www/users/...') #15 {main} thrown in /usr/www/users/daszfi/wp-includes/class-wp-widget.php on line 163