I I made myself an operator on my server and went to Settings>Game>Cheats and clicked "Activate Cheats", and then when the window comes up I clicked "Continue", but after that nothing happens and cheats remain off. If I click the "Activate Cheats" switch again, nothing happens.
Is this a bug, or am I doing something wrong?
EDIT: I figured it out. I'm not sure if there's any way to do it in-game even if you're an operator, but I found out you can do it from the console with the command:
changesetting allow-cheats true
EDIT 2: I also found out that using that command doesn't permanently change it, you need to go to server.properties to do that.