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: 29.03.2024 @ 10:19
Script: /board/search.php?action=user&userid=23&sid=6b65b5ffb2d3074f2265b2c46f5093d7
Referer: