"Cheats aren't enabled in this level" when typing commands in Lifeboat Network

Typing "/" in the chat in Lifeboat Survival Games, just show this message "Cheats aren't enabled in this level". Before this version, it was possible to type several commands on this server. After updating to version 1.2.20.2, I realized that I cannot use it anymore. Is this a bug? Or the admin just disabled commands?