HDCP handshake issues can be caused by the HDMI cable that is used if the pins are damaged or the cable does not conform to the correct HDMI specifications.
Why am I suddenly getting an HDCP error?
HDCP errors happen when there is a problem with the physical connection or communication between your Roku and TV. Often, it’s a simple matter of reconnecting the HDMI cable: Unplug both ends of the HDMI cable. Turn off or unplug power from the TV and Roku.
Does my HDMI cable support HDCP?
How do I check if my HDMI cable is HDCP compliant? Please check if your cable is HDCP compliant at hdmi.org. You can do a quick search of the brand of the cable or look for tags/stickers on your cable that say ‘HDCP compliant. ‘
Is HDMI and HDCP the same thing?
HDCP often gets confused with HDMI, and while they’re related they obviously aren’t the same. HDCP provides copy protection and piracy prevention for three main connection types, including HDMI. The other two are DVI and DisplayPort.