Welcome to the Roku Community, @Kerrberr2003!
Thanks for reaching out here. No worries! We'd be happy to help you troubleshoot this app to help you sign in successfully.
Please try to select the sign-out option if it prompts you to sign in to your Paramount Plus account. If not try to highlight the channel tile of this app and press the star (*) button to see if 'Update this app' is one of the options.
Keep us posted on how it goes!
Best regards,
Carly
Carly Y.
Roku Community Moderator