widget issue

The widget related to this project gives an error:
<b>Notice</b>: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in <b>/var/www/html/wp/wp-includes/functions.php</b> on line <b>3406</b>

However, i used also shortcode to add the icons on website.

thanks

https://ww.wp.xz.cn/plugins/awesome-social-icons/