Error al generar zip, Class 'ZipArchive' not found about demo HOT 2 CLOSED

 public function generar_comprobante($invoice)
{
		$util = Util::getInstance();
		// Envio a SUNAT.
		$see = $util->getSee(SunatEndpoints::FE_PRODUCCION);
		$res = $see->send($invoice);
		
		if ($res->isSuccess()) {
		$cdr = $res->getCdrResponse();
		$nexus = "|".$util->getResponseFromCdr($cdr);    
		$this->sms = "correcto".$nexus;
		
		Util::writeXml($invoice, $see->getFactory()->getLastXml());
		$pdf = $util->getPdf($invoice);
		$util->showPdf($pdf, $invoice->getName().'.pdf');  
		Util::writeCdr($invoice, $res->getCdrZip());                               
		} else {
		$this->sms = $res->getError()->getMessage();
		}
		return $this->sms;
}