Fatal error: Connecting to MySQL server 'localhost' failed.

You get more information about the problem in our knowledge base: http://www.woltlab.com/help/?code=2002

Information:

error message: Connecting to MySQL server 'localhost' failed.
error code: 2002
sql type: MySQLDatabase
sql error: No such file or directory
sql error number: 2002
sql version:
file: /var/www/html/lafeo_portal/forum/wcf/lib/system/database/MySQLDatabase.class.php (29)
php version: 5.6.40-68+0~20230902.80+debian10~1.gbpa2012b
wcf version: 1.0.11 pl 3 (Horizon)
date: Mon, 06 May 2024 02:38:38 +0000
request: /forum/index.php?page=Thread&postID=76
referer:

Stacktrace:

#0 /var/www/html/lafeo_portal/forum/wcf/lib/system/database/Database.class.php(76): MySQLDatabase->connect()
#1 /var/www/html/lafeo_portal/forum/wcf/lib/system/WCF.class.php(270): Database->__construct(...)
#2 /var/www/html/lafeo_portal/forum/wcf/lib/system/WCF.class.php(88): WCF->initDB()
#3 /var/www/html/lafeo_portal/forum/global.php(18): WCF->__construct()
#4 /var/www/html/lafeo_portal/forum/index.php(8): require_once('/var/www/html/l...')
#5 {main}