SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: User 'c4fboard' has exceeded the 'max_user_connections' resource (current value: 20)
mysql error number: 1226
mysql version: unknown
php version: 5.6.3
Date: 05.12.2020 @ 09:42
Script: /board.php?boardid=35&page=1&daysprune=20&sortfield=replycount&sortorder=DESC
Referer: