Kodi on laptop vs android box

Hi. I’m new here today and I’m confused re why on my box I can see episodes listed, but when I click to view, I get “no stream avail”, but when I open Kodi on my laptop, I can view that same episode no problem. Re “Preacher”

I bought someone’s older android box and I don’t know if they added the programs, but when I’m in system , I click on update, and nothing happens, i get taken back to new screen.

I can watch the entire movie “Nine Lives” (about the cat) on the on my laptop, but on the tv box I can see that it’s available, it goes through the motions of getting supplier list etc, then “no stream available”

Help. Please. I am not too good with techy stuff, so do I need to get a new tv box? I can’t seem to upgrade the box I have, or how to do it, AND I saw a message saying something about the cache ! I’m so confused !