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: 29.03.2024 @ 13:31
Script: /board/register.php?sid=2a4ef6b3fce36138685d8f82e31bbf8b
Referer: