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 @ 17:13
Script: /board/usercp.php?action=addsubscription&boardid=4&sid=ac7ba72ed8ee4d016bc3c6e2da028c37
Referer: