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: 25.04.2024 @ 01:02
Script: /jgs_portal_links.php?kat_id=13&sid=f5017c3765079ac0ac074fe9b9c82791
Referer: http://www.biker-community.com/jgs_portal_links.php?kat_id=13&sid=f5017c3765079ac0ac074fe9b9c82791