Hi there
Sony does not have any control on what apps are available or discontinued - according to the Red Bull TV website, Only Android TVs, Samsung (2013+) TVs and LG (2013+) TVs are supported, see:
https://www.redbull.tv/apps
Suggest contacting Red Bull TV to find out why you are getting this error:
http://feedback.redbull.tv/
Cheers
