Fatal error: Uncaught Error: Class "phpseclib3\Crypt\Common\StreamCipher" not found in C:\SHC\xampp\htdocs\shc_mobile_backend\vendor\composer\a71a596e\phpseclib-phpseclib-89bfb45\phpseclib\Crypt\Salsa20.php:30 Stack trace: #0 {main} thrown in C:\SHC\xampp\htdocs\shc_mobile_backend\vendor\composer\a71a596e\phpseclib-phpseclib-89bfb45\phpseclib\Crypt\Salsa20.php on line 30