I had the latest November patch already applied but that shouldn't make a difference. Bit of a silly question, but you do have an unlocked Note 10 and when you go to the Beta Registration, you did press the sign up button because if you have then it should show a withdraw option instead now. Don't press that as it'll take you off the beta and you likely won't be able to join again.
Check your beta registration status and then try the software update again.