Hi - I constantly get "app cannot be installed" when downloading APKs like FilmPlus. The box is running Android 11.
Hi Marc57979- I don't know anything about it but it you scroll way down here- https://www.firesticktricks.com/filmplus.html it tells you how to do it. Perhaps the information there will tell if you're doing something wrong or you need to take additonal steps than what you've done.
