Welcome and thank you for posting here at the Roku Community, @danda!
Firstly, please be aware that the Roku Community only supports the English language. In this case, we wanted to let you know that we used a translator tool to help us comprehend your issue and assist you further with this.
Regarding your concern, may we know what Roku streaming device you are having this issue with and where you are currently located? Please be advised that the Max app upgraded their system, hence the changes. It's also possible that Paramount+ has upgraded its system and will no longer support the availability in your region.
Furthermore, try to check for updates on your Roku device's system by navigating to your Home screen. Scroll up or down to select Settings > System > System update > Check Now.
The best course of action will be suggested once we have a better understanding of the situation. We'll be anticipating your response.
Kind regards,
Carly
Carly Y.
Roku Community Moderator