Fatal error: Uncaught Error: Class 'Omnipay\Common\AbstractGateway' not found in /home/app/htdocs/ninja/vendor/omnipay/paymentexpress/src/PxPostGateway.php:14
Stack trace:
#0 {main}
thrown in /home/app/htdocs/ninja/vendor/omnipay/paymentexpress/src/PxPostGateway.php on line 14