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.
Questions about Hulu content should be directed to Hulu. Roku just supplies the platform on which the Hulu app runs, but Hulu is responsible for the app itself and its content. Hulu help center: https://help.hulu.com/
I expect HBO and Roku will come to agreement over HBO Max carriage eventually. HBO hasn't come to agreement with Amazon either at this point.
Roku Streaming Stick +, 3810X, Ser YH0059427035, wifi - Samsung UN55ES6100
Roku Streaming Stick, 3600X, Ser 5S56D8240827, wifi - JVC EM37T