Fire Stick Kodi – Exodus/Phoenix and other Addons not working

I’ve just bought two Amazon Fire Sticks. One worked perfectly with Kodi and I have installed Exodus, Phoenix and one or two others successfully however on the second Fire Stick, everything has been loaded in the same way yet when I open the Video Addons and try and click the various links, in movies, tv, music etc, nothing loads at all – nothing happens. I’ve tried absolutely everything I can think of as a novice, checked the Fire Stick settings, ensured the two developer options – ADB debugging and APPs from Unknown sources are ON, reloaded the current Kodi V16 Jarvis, checked the various addons settings, cleared cache’s and reloaded them from various sources but nothing changes. I’ve followed different instructions on the web and everything else I can think of yet I’ve had no luck whatsoever with the second Fire Stick? Has anyone got any ideas at all? It almost sounds like it is a “permissions” type scenario with the Fire Stick itself but that doesn’t explain why everything is fine on the first Fire Stick but not the second. Is it worth me trying to install the new Kodi V17 Krypton?