SQL-DATABASE ERROR

Database error in WoltLab Burning Board: Link-ID == false, connect failed
mysql error: The server requested authentication method unknown to the client
mysql error number: 2054
Date: 20.04.2024 @ 11:59
Script: /board/search.php?action=user&userid=3&sid=ab2228850dd6c2ba70448a3bfd4400b4
Referer: