I've been having issues with catch up for 2 or 3 months getting the 603 error. Have checked and followed the online help and my equipment is HDCP 2.2. I have had no issues in the past. Tried rebooting, reconnecting cables, connecting to different HDMI ports all with no success. This is now very frustrating more so considering how much I pay for my service each month and I can't take full advantage of what I am paying for.
The Onkyo is TX-RZ830 and the TV is LG OLED65C8PLA both are HDCP2.2 rated according to the specifications. I have had no problems until fairly recently. My TIVO box was set to Auto for the video output format and I've tried both the 1080p options individually and setting to 2160p (both) and 1080p (both) but still no joy.