Fatal error: Uncaught Error: Interface "Psr\Http\Message\RequestInterface" not found in D:\xampp\htdocs\ssw_doc\vendor\mpdf\psr-http-message-shim\src\Request.php:15
Stack trace:
#0 {main}
thrown in D:\xampp\htdocs\ssw_doc\vendor\mpdf\psr-http-message-shim\src\Request.php on line 15