What model Roku do you have?
This is currently a private/uncertified channel you add to your account by entering its code when logged into your Roku web account. It may not install from your account to your Roku device, though, if you have an older Roku model that the channel was not written to support. I cannot find info on the O'Reilly site re what Roku models are supported.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X