Hi. If you are using RedBull TV app on Android XPERIA tablet, it should be compatible and play once you start your subscription. You can use it on your Sony mobiles, Android running TV and many other platoforms. The TV App itself is compatible with even Xbox, Playstations. So, try to uninstall and install again. If the problem persists, contact RedBull TV services at:
You can also use another alternative TV app for SONY XPERIA and all other Android mobiles to watch Live TV, Movies and TV series without subscrption. It is called Vizer and you can download it from their official website.