Notice: The called constructor method for WP_Widget is deprecated since version

Just sharing this fix… I couldn’t reply to the other topic with the same issue.

Old code line 22 > like-box-widget.php
$this->WP_Widget( 'like_box_widget_facbook', 'Widget Facebook like box', $widget_ops, $control_ops ); // Create the widget

Replace with
parent::__construct('like_box_widget_facbook', 'Widget Facebook like box', $widget_ops, $control_ops);