Fatal error: Uncaught Error: Interface "PhpOffice\Math\Reader\ReaderInterface" not found in E:\phpProject\TEST\vat_api_de_client\vendor\phpoffice\math\src\Math\Reader\MathML.php:14 Stack trace: #0 {main} thrown in E:\phpProject\TEST\vat_api_de_client\vendor\phpoffice\math\src\Math\Reader\MathML.php on line 14