What is the command to have automated messages?

This is what I tried:

{
"EnableInGameTime-Timer": true,
"EnableRealTime-Timer": false,
"EnableTimerOnce": false,
"EnableTimerRepeat": true,
"InGameTime-Timer": {
"01:00": "weather rain",
"12:00": "command 1",
"15:00": "command 2"
},
"RealTime-Timer": {
"16:00:00": "command1 arg",
"16:30:00": "command2 arg",
"17:00:00": "command3 arg",
"18:00:00": "command4 arg"
},
"TimerOnce": {
"command1 'msg'": 60,
"command2 'msg'": 120,
"command3 arg": 180,
"reset.timeronce": 181
},
"TimerRepeat": {
"say Type /Help for more information": 300,
"say 'test'": 10
}
}

say is the command, what is the issue?

Try "server.say" instead.

Use the AutoBroadcast