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: 25.04.2024 @ 14:15
Script: /board/usercp.php?action=addsubscription&boardid=7&sid=821152d7e27a2c7b38d42fd44cb00cf9
Referer: