Fatal error: Uncaught Error: Class "Pkcs11\Module" not found in /var/www/privatewebs/jan.slabon/default/SetaPDF-Signer-Addon-PKCS11/examples/demo.php:16 Stack trace: #0 {main} thrown in /var/www/privatewebs/jan.slabon/default/SetaPDF-Signer-Addon-PKCS11/examples/demo.php on line 16