Had the HDCP error on and off after setting up my ROKU Ultra. Went through all the suggestions to fix the problem ROKU had on their site. Nothing helped, HDCP error would pop up once in awhile then program would come back on and stream normally. I finally realized I had the HDMI plugged into the HDMI(arc) input and thought maybe that was the issue. I plugged the HDMI cable from my ROKU into a normal HDMI input and all has been fine for the last week and I anticipate no further problems. Hope this helps someone and if it has already been tried I wish I would have found it a month ago.