Fatal error: Uncaught TypeError: array_merge(): Argument #2 must be of type array, null given in /www/apache/domains/www.sandrelle.net/htdocs/wp-includes/widgets.php:589
Stack trace:
#0 /www/apache/domains/www.sandrelle.net/htdocs/wp-includes/widgets.php(589): array_merge(Array, NULL)
#1 /www/apache/domains/www.sandrelle.net/htdocs/wp-includes/class-wp-widget.php(540): _register_widget_update_callback(NULL, Array, NULL, Array)
#2 /www/apache/domains/www.sandrelle.net/htdocs/wp-includes/class-wp-widget.php(249): WP_Widget->_register_one()
#3 /www/apache/domains/www.sandrelle.net/htdocs/wp-includes/class-wp-widget-factory.php(102): WP_Widget->_register()
#4 /www/apache/domains/www.sandrelle.net/htdocs/wp-includes/class-wp-hook.php(287): WP_Widget_Factory->_register_widgets('')
#5 /www/apache/domains/www.sandrelle.net/htdocs/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array)
#6 /www/apache/domains/www.sandrelle.net/htdocs/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#7 /www/apache/domains/www.sandrelle.net/htdocs/wp-includes/widgets.php(1765): do_action('widgets_init')
#8 /www/apache/domains/www.sandrelle.net/htdocs/wp-includes/class-wp-hook.php(287): wp_widgets_init('')
#9 /www/apache/domains/www.sandrelle.net/htdocs/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array)
#10 /www/apache/domains/www.sandrelle.net/htdocs/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#11 /www/apache/domains/www.sandrelle.net/htdocs/wp-settings.php(540): do_action('init')
#12 /www/apache/domains/www.sandrelle.net/htdocs/wp-config.php(25): require_once('/www/apache/dom...')
#13 /www/apache/domains/www.sandrelle.net/htdocs/wp-load.php(37): require_once('/www/apache/dom...')
#14 /www/apache/domains/www.sandrelle.net/htdocs/wp-blog-header.php(13): require_once('/www/apache/dom...')
#15 /www/apache/domains/www.sandrelle.net/htdocs/index.php(17): require('/www/apache/dom...')
#16 {main}
thrown in /www/apache/domains/www.sandrelle.net/htdocs/wp-includes/widgets.php on line 589
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