Fatal error: Uncaught Error: Interface "CoreInterfaces\Http\HttpClientInterface" not found in /usr/www/pireborn/public/Donate/vendor/apimatic/core/tests/Mocking/MockHttpClient.php:10 Stack trace: #0 {main} thrown in /usr/www/pireborn/public/Donate/vendor/apimatic/core/tests/Mocking/MockHttpClient.php on line 10