Hey @Njp1
Welcome to your first post in the Roku Community!
We're sorry to hear about your login issues, and we'd be more than happy to help. Since you can't create an account on the Roku mobile app, you can visit our website at my.roku.com and create an account from there. Just fill up the required credentials, and you should be able to create an account to start streaming.
If you have further inquiries, let us know!
All the best,
Kash
Takashi O.
Roku Community Moderator