Fatal error: Uncaught Error: Interface "PhpOffice\Math\Writer\WriterInterface" not found in E:\phpProject\TEST\vat_api_se_client\vendor\phpoffice\math\src\Math\Writer\OfficeMathML.php:10 Stack trace: #0 {main} thrown in E:\phpProject\TEST\vat_api_se_client\vendor\phpoffice\math\src\Math\Writer\OfficeMathML.php on line 10