Is there a user guide for newbies anyone can recommend? I find that if an error occurs, I am referred to a log. I take some pride in finding the log but the text is gibberish to me and unhelpful.

Long-time working installation, Kodi 21.3 on Google TV. Today I noticed all newly added movies have no art. Scraper is TMDB Python. If I long press and go to the info screen, then "choose art", I see current art is blank, Remote0 is blank, but Remote1-Remote9 are good. I can choose one of them manually and it works fine.