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: 18.04.2024 @ 07:01
Script: /board/usercp.php?action=addsubscription&boardid=11&sid=2f4ffef7af3e85def9ad49bee429bccf
Referer: