Fatal error: Uncaught Error: Interface "Psr\Http\Message\StreamInterface" not found in E:\phpProject\TEST\vat_api_de_client\vendor\guzzlehttp\psr7\src\BufferStream.php:17 Stack trace: #0 {main} thrown in E:\phpProject\TEST\vat_api_de_client\vendor\guzzlehttp\psr7\src\BufferStream.php on line 17