Fatal error: Uncaught Error: Class 'ubl21dian\Sign' not found in /home/wwvicp/public_html/API2/vendor/ubl21dian/torresoftware/src/BinarySecurityToken/SOAP.php:12 Stack trace: #0 {main} thrown in /home/wwvicp/public_html/API2/vendor/ubl21dian/torresoftware/src/BinarySecurityToken/SOAP.php on line 12