<?php
//echo base64_encode(random_bytes(16));
$bytes = random_bytes(5);
?>

Fatal error: Uncaught Exception: Could not gather sufficient random data in /var/www/vhosts/test/test.php:3 Stack trace: #0 /var/www/vhosts/test/test.php(3): random_bytes(5) #1 {main} thrown in /var/www/vhosts/test/test.php on line 3