More info is needed. How are you subscribing to Paramount+? Direct to P+, through Roku, through The Roku Channel, free through WalMart+?
If you subscribe direct to Paramount+ or from Walmart+, you should be able to install the app and log in. For subscribing through Roku, just install the app, and it should automatically be logged in. If through The Roku Channel, you must access it through The Roku Channel.
