Errox Sintaxis….webpay.php

Hello, I from Chile.

I can not install Woocommerce Webpay ( Chilean Payment Gateway ) because I mark this bug, someone that can occur

Parse error: syntax error, unexpected T_PUBLIC in /opt/www/vhost/imostore/store/wp-content/plugins/webpay-woocommerce-plugin/webpay.php on line 363

https://www.ads-software.com/plugins/webpay-woocommerce-plugin/