Fatal error on activation in PHP 8.1

To fix it replace in file
santas-christmas-countdown\xmascount.php line: 111
add_action( 'widgets_init', create_function('', 'return register_widget("cw_axmascount");') );

with:

function cw_axmascount_register_widgets() {
	return register_widget( 'cw_axmascount' );
}
add_action( 'widgets_init', 'cw_axmascount_register_widgets' );

And also replace in file
\santas-christmas-countdown\xmascount.php line: 69 the function

function cw_axmascount()
  {
    $widget_ops = array('classname' => 'cw_axmascount', 'description' => 'Drag this widget to your sidebar to display Santa\'s Christmas Countdown.' );
    $this->WP_Widget('cw_axmascount', 'Santa\'s Countdown', $widget_ops);
  }

with:

public function __construct() {
		$widget_ops = array(
			'classname'   => 'cw_axmascount',
			'description' => 'Drag this widget to your sidebar to display Santa\'s Christmas Countdown.',
		);
			parent::__construct(
				'cw_axmascount',
				'Santa\'s Countdown',
				$widget_ops
			);
	}