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 @ 00:31
Script: /wbb/formmail.php?userid=97&sid=436ab25d3e781ff17a088222daa924df
Referer: http://www.delftseschaaksite.nl/wbb/formmail.php?userid=97&sid=436ab25d3e781ff17a088222daa924df