error in debug

When I threw WP into debug for another problem I get this error message that is coming from ST-Daily Tips.

Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use
__construct()
instead. in /home/content/p3pnexwpnas02_data01/82/2074882/html/wp-includes/functions.php on line 3624

When I deactivate the plugin it goes away.

https://wordpress.org/plugins/st-daily-tip/