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: 27.07.2024 @ 09:22
Script: /wbb/register.php?sid=4e9876b9cb4a7faa557d79e49ae9ee8f
Referer: http://delftseschaaksite.nl/wbb/register.php?sid=4e9876b9cb4a7faa557d79e49ae9ee8f