SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Link-ID == false, connect failed
mysql error: No such file or directory
mysql error number: 2002
mysql version: unknown
php version: 5.6.40-nmm8
Date: 16.05.2024 @ 05:31
Script: /xforum/profile.php?userid=3258&sid=ff97f93a5fdabdb2733cad6e93ab9d95
Referer: