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: 18.07.2025 @ 23:55
Script: /board/register.php?sid=8d074de05c3ecaf552afbcb6a55e8e3a
Referer: