What is unknown command encountered?

Unknown command encountered is often occur during live YouTube chat. There are plenty reasons that can be responsible for the error. 

Solution

The easiest solution is to clear the cache and see if the error keeps on appearing or not!

There are commands which are restricted during live chat. So if a user runs the command then the error is going to appear.

however there are certain allowed commands. If a user uses any other command beyond the predefined commands then this error can also occur.

Bottom line, hackers are keep on trying to find loop hole. So you must have to beware of such action.

Unknown command encountered keeps popping up and won't let me type in live chat rooms in YouTube ple 0 Recommended Answers 2. Unknown Command Encountered !!!!!!! - Macromedia Freehand. Generally, Android users encounter “No Command” error when they try to install any new software.

SOLUTION: how to fix an error on youtube/error occurred or error playback/ youtube not working. I encountered this kind of problem also, when updating SDK