Can't send messages to the server in game

[MuriyaTensei]

There are some commands that prompt me to "Run this command in-game." But I can't send any messages to the server in the game. Whether I entered the command or other words and clicked send but nothing happened

[CR4Player]

command send to server need a "!" prefix, like !help, !give 223 100
maybe you forgot this.

[MuriyaTensei]

command send to server need a "!" prefix, like !help, !give 223 100 maybe you forgot this.

Thanks, I really didn't add the prefix, Now it works

[memetrollsXD]

Also to keep in mind: Some commands may not give you a reply back