Why I get Login failed error on my 2nd TV box

If you only use MujiTV on 1 TV box or FireTV, you can select 'exit' when you finish watching.
If you have more than 1 TV boxes or FireTV sticks at home to use the same MujiTV account, then you should select "unbind" when you finish watching.

"Unbind" allows you to log out and delete the Mac address recorded in MujiTV system so that you have no problem to log in to other TV box or FireTV.