My Apple TV keeps coming up with A27 HDCP error

I have an Apple TV 4K and have had no issues until now. All of sudden when I try to watch Netflix it comes up with this HDCP error saying Check hdmi cable is plugged in Or that my tv doesnt support hdmi even though it was working perfectly 20 minutes prior to the error coming up. I’ve changed cords and hdmi ports then reset it and got it working again only for it to come up with the same error a day later. Any ideas on how to stop this from happening or is this a case of returning a faulty Apple product?