Acestream don´t works fine in my TV BOX

I´ve bought a new TY BOX the “Mecool Km2”, and Acestream don´t works properly i´ve any time the error message “unknow device invalid session id.” or similar, I´ve in home some others devices like Fire TV 4k and Xiaomi Tv Box and i have´nt this problem in this ones.
Can you help me ? I had prouve instaling Ace Stream Media and Ace Stream Engine, and in both of them i´ve the same problem.
Best regards.

Are you sure that such messages is Ace Stream related? Can you provide a screenshot or photo of TV screen with such error message?
Also, please note - for Android TV devices “Ace Stream Live TV” is more preferable app.