For queries about addons you are much better served by the Kodi forum Kodi Community Forum - Add-on Support or by contacting the add-on developer directly.
Since you appear to not be using CEC, use Settings>System>Input>Peripherals>CEC and disable it completely if you don’t wish to see the errors in the log.
Then buy a display that supports CEC. Otherwise, the advice I’ve given is to disable a feature that your hardware appears not to support and that you don’t appear to use.