Fatal error: Uncaught ArgumentCountError: Too few arguments to function WP_Widget::__construct(), 0 passed in /customers/7/e/e/igel.it/httpd.www/blog/wp-includes/class-wp-widget-factory.php on line 61 and at least 2 expected in /customers/7/e/e/igel.it/httpd.www/blog/wp-includes/class-wp-widget.php:162
Stack trace:
#0 /customers/7/e/e/igel.it/httpd.www/blog/wp-includes/class-wp-widget-factory.php(61): WP_Widget->__construct()
#1 /customers/7/e/e/igel.it/httpd.www/blog/wp-includes/widgets.php(115): WP_Widget_Factory->register('al_flickr_widge...')
#2 /customers/7/e/e/igel.it/httpd.www/blog/wp-content/themes/balance/library/functions/widgets.php(91): register_widget('al_flickr_widge...')
#3 /customers/7/e/e/igel.it/httpd.www/blog/wp-content/themes/balance/functions.php(27): require_once('/customers/7/e/...')
#4 /customers/7/e/e/igel.it/httpd.www/blog/wp-settings.php(528): include('/customers/7/e/...')
#5 /customers/7/e/e/igel.it/httpd.www/blog/wp-config.php(90): require_once('/customers/7/e/...')
#6 /customers/7/e/e/igel.it/httpd.www/blog/wp-load.php(37): require_once('/customers/7/e/...')
#7 /customers/7/e/e/igel.it/httpd.www/blog/wp-blog-header.php(13): require_once('/customers/7/e/...')
#8 /customers/7/e/e/igel.it/httpd.www/blog/index.php(17): require('/customers/7/e/...')
#9 {main}
  thrown in /customers/7/e/e/igel.it/httpd.www/blog/wp-includes/class-wp-widget.php on line 162