Fatal error: Uncaught Error: Class 'Zend_Oauth_Signature_SignatureAbstract' not found in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables\libreria\Zend\Oauth\Signature\Hmac.php:34 Stack trace: #0 {main} thrown in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables\libreria\Zend\Oauth\Signature\Hmac.php on line 34