SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Can't connect to local MySQL server through socket '/srv/.mysql/mysql.sock' (111)
mysql error number: 2002
mysql version: unknown
php version: 5.6.19
Date: 18.05.2024 @ 04:09
Script: /usercp.php?action=addsubscription&boardid=13&sid=e82c46f25951e92c22593748f1f2a5ec
Referer: