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 @ 00:48
Script: /board/usercp.php?action=addsubscription&boardid=11&sid=def7b98098d300baa4973e29f4255667
Referer: