help me failed to open stream

Warning: require_once(/public_html/wp-content/plugins/veritrans-woocommerce-payment-gateway/class/../lib/veritrans/Veritrans.php): failed to open stream: No such file or directory in /public_html/wp-content/plugins/veritrans-woocommerce-payment-gateway/class/class.veritrans-gateway.php on line 4

Fatal error: require_once(): Failed opening required ‘/public_html/wp-content/plugins/veritrans-woocommerce-payment-gateway/class/../lib/veritrans/Veritrans.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /public_html/wp-content/plugins/veritrans-woocommerce-payment-gateway/class/class.veritrans-gateway.php on line 4

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