After the installation finished, in the [Setting Cryptographic salt in config file] shows this:

POSSIBLE PROBLEM
Unable to find a random number source for cryptographic purposes. You will need to edit D:\mantisbt\config\config_inc.php and set a value for $g_crypto_master_salt manually

But I already set $g_crypto_master_salt manually like this:

<?php
$g_hostname = 'localhost';
$g_db_type = 'mysqli';
$g_database_name = 'bugtracker';
$g_db_username = 'mantis';
$g_db_password = 'mantis';

$g_db_table_plugin_prefix = 'mantis';
$g_db_table_suffix = 'mantis';

$g_default_timezone = 'Asia/Shanghai';

$g_crypto_master_salt = 'mantis1234567890abcdefghijklmnopqrstuvwxyz';

How to deal with it?

thanks.