Exception class: RuntimeException()

ERROR: Cannot connect to MySQL database.
Possible reasons:

• MySQL is not configured propertly in config.lua.
• MySQL server is not running.

SQLSTATE[HY000] [2002] No connection could be made because the target machine actively refused it

File: C:\inetpub\wwwroot\system\database.php
Line: 113


Backtrace:

#0 C:\inetpub\wwwroot\system\init.php(124): require_once()
#1 C:\inetpub\wwwroot\index.php(77): require_once('...')
#2 {main}