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: 28.03.2024 @ 16:23
Script: /board/usercp.php?action=buddy&add=50&sid=0c1f0346417a0b32d69f4375535b4c5c
Referer: