Have this issue on my RokuTV Plus model G853 running OS 12.5.0 build 4167 and AppleTV app 13.5 build 56. AppleTV app does not give an Activation Code on this OS like it did and still does on earlier Roku OS versions, so you can not activate the AppleTV app via code. If you try to log in with your email and password the AppleTV app fails and just spits out error codes. Roku support says it is an Apple support issue. AppleTV support says it is a Roku support issue. So the only ?support? I've got from Roku and/or AppleTV is finger-pointing at the other. No attempt by either company to work with the other for the benefit of their customers. Customers just left stuck in the middle with no solution.