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: 21.05.2024 @ 00:17
Script: /wbb/usercp.php?action=buddy&add=135&sid=a27b9d0f7107ad8cf242c69db8192ed3
Referer: