Hi there and welcome
Your doing this on your Roku? Or your first setting up the account on your computer to use the account on your Roku?
Please let me know?
Can you tell me please which model Roku you have?
Power off the TV, and remove the Stick.
Wait 5 minutes, connect the Stick, turn on the TV and tell me if it now functions correctly please
yes understood, but can you do the last instructions I gave you please?