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 @ 23:55
Script: /board/search.php?action=user&userid=47&sid=c504dfd264cc49a1e7795a39df09c4f4
Referer: