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 @ 11:31
Script: /board/formmail.php?threadid=932&sid=f73a621ee90b7d900d8979180b42612e
Referer: