Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
My Roku has been set up and operational for a number of years, without problem.
I see that HBO Max is supported, set up a subscription and attempted to add the channel. My device finds it, but fails when I attempt to add it with a generic "error" message. I rebooted the Roku and tried again. no luck.
I checked my account on the web and I see that HBO Max is showing as "Installed" but it is not showing as installed on my device.