Fatal error: Uncaught Error: Class "Adyen\ApiKeyAuthenticatedService" not found in C:\Apache24\htdocs\cms_upgrade\vendor\adyen\php-api-library\src\Adyen\Service\PosPayment.php:9
Stack trace:
#0 {main}
thrown in C:\Apache24\htdocs\cms_upgrade\vendor\adyen\php-api-library\src\Adyen\Service\PosPayment.php on line 9