Fatal error: Uncaught Error: Class "Zend_Oauth_Signature_SignatureAbstract" not found in C:\SHC\xampp\htdocs\shc_mobile_backend\vendor\diablomedia\zendframework1-oauth\src\Zend\Oauth\Signature\Hmac.php:28 Stack trace: #0 {main} thrown in C:\SHC\xampp\htdocs\shc_mobile_backend\vendor\diablomedia\zendframework1-oauth\src\Zend\Oauth\Signature\Hmac.php on line 28