Fatal error: Uncaught Error: Class 'phpseclib3\Crypt\Salsa20' not found in /var/www/dsmailer/modules/dsmailer_campaigns_managment/server-side/phpseclib3/Crypt/ChaCha20.php:28 Stack trace: #0 {main} thrown in /var/www/dsmailer/modules/dsmailer_campaigns_managment/server-side/phpseclib3/Crypt/ChaCha20.php on line 28