PHP7 issues

Hello,

You have the following error due to PHP7

[12-Feb-2016 14:30:28 UTC] PHP Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; InviteReferralsWidget has a deprecated constructor in /public_html/wp-content/plugins/invitereferrals-customer-referral-program/invitereferrals.php on line 40

A quick fix

function __construct() {
            parent::WP_Widget(false, 'InviteReferrals Widget', array('description' => 'Description'));
        }