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: 26.04.2024 @ 11:06
Script: /board/usercp.php?action=addsubscription&boardid=24&sid=a6b5b69af02a6fa2976804bc78564142
Referer: