Well that is odd. What device are you using and what OS? If using say a windows computer then you have the wrong installation and that may explain some of your issues. Windows is 4.4 the 1.8.4 you have is Android. .Stremio has no need of USB debugging at all. I’ve installed this on devices from the Firestick to my P6L and other than issues trying to figure out advanced settings, which has to do with my lack of knowledge and nothing to do with the addons or Stremio. Far easier to configure and use then Kodi by a long shot IMHO. I have been using Stremio for years with a great deal of pleasure.
Look here for kodi umbrella help.