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: 20.04.2024 @ 12:52
Script: /board/register.php?sid=3eea8206a9a5ae6ec8c78a3dbabe83cc
Referer: