apple tv doesn't work on my Roku tv

I have a Roku Tv and apple one, downloaded and even deleted and downloaded again, I also reset the app. It shows all the shows like it is working but when i play it says cannot play at the moment check internet. My internet is always connected, so that is not accurate. I made sure I was still active on subscription. I have changed HDMI cables. I have tried everything. I've been paying for this for months and still cannot watch anything on this app- all other apps work perfect!