SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Can't connect to local server through socket '/var/lib/mysql/mysql.sock' (2)
mysql error number: 2002
mysql version: unknown
php version: 5.6.40
Date: 30.04.2024 @ 18:12
Script: /jgs_portal_links_user.php?action=link_redirect&id=146&sid=be9fc9148b2faf00e85a6ba9073aa78d
Referer: