Ssl certificate error amazon fire tv and susi.comcast.net redirects was this ever resolved? What do I do?

Good morning @eph221, and thanks for posting your issue to the Xfinity forums, I hope this message finds you well. I am sorry to hear that you are having issues with the internet on the Amazon Fire TV. You mentioned that you have a new gateway, is the internet working on other devices other than the TV in question with the new gateway?