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 @ 19:38
Script: /board/register.php?sid=66eee5e642f5b39f8adca721e0e5a5d2
Referer: