Hi @iisusi,
Welcome to the Roku Community!
We understand you're having a problem with the HBO Max or Max app. Help is here. Please be advised that HBO Max is now the Max app since the last update. You can use the same credentials to access the channel. If you need further assistance with the channel, we suggest contacting the channel provider's support team for further assistance.
Please let us know if there is anything else we can do to help you.
Best regards,
John
John
Roku Community Moderator