Hi @jagustinugalde,
Welcome to your first post here in the Roku Community!
Thanks for bringing this to our attention, and we would be more than glad to assist you regarding this. We recommend performing a factory reset to your Roku Express 4K since you're still setting up your Roku device. For more information on how to factory reset your Roku streaming device, kindly refer to this support article at this link: How to system restart or factory reset your Roku streaming device|System restart or factory reset yo...
After performing this step, kindly check if you're able to set up your device.
Please let us know how it goes.
All the best,
Kash
Takashi O.
Roku Community Moderator