Apple TV not playing from Roku TV

Like some others I have read, all of a sudden Apple TV will not play from our Roku TVs. Previews play but not actual movies or episodes. The account is fine because it plays from my phone. Connection is fine —despite a bad connection msg that pops up when we attempt to play it—but other services/streaming channels are working fine on the Roku tv. Tried to remove Apple TV and reinstall it but it wouldn’t load, so now on both our Roku tv’s there is no longer even an Apple TV channel/app!