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 @ 13:45
Script: /board/register.php?sid=2b4df1e12bf077b10c4e23bac21abe88
Referer: