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: 20.04.2024 @ 10:35
Script: /board/usercp.php?action=addsubscription&boardid=9&sid=00b91b090c55dd1e93d699e7bde5d96b
Referer: