applications – Android app designed to work on SmartPhone But not TV

I have installed an app call mytv+ for Samsung A7 and worked fine. I tried to install it on the android tv box (MX9 PRO 4k) but simply not working, just getting error code: (100). I contacted the developer he said this app is designed only for the smartphone and Error:(100) means that your android is rooted! so I noticed Supersu on my Android TV BOX! I went for a full unrooting yet the app still shows Error Code: (100).

is there any way I can force the app to work with the android tv box?