Enter Netflix registration code?

I want to register on Netflix. I could only do a trial version for 30 days. Now the browser says "Please enter the registration number shown on the TV", but on the TV there's only Netflix advertising. What to do?

Please follow the installation instructions on the TV screen and when you are at the picture you showed here,

note that it said:

"Step 2 of 4"

So continue to the next step and the step after next and then it is done! 😉