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 '/var/run/mysqld/mysqld.sock' (2)
mysql error number: 2002
Date: 28.03.2024 @ 17:42
Script: /board.php?boardid=5000325&sid=22087b6b1a66cd8171bb0309ada10ef7
Referer: