[Floating window isn't showing on the game interface]

I already did both of things last time and I did it again just to be sure but the problem still presents.. 

My phone is oppo f1s 

Android version : 5.1 

Rooted 

[Floating window isn't showing on the game interface]

Floating window appears to be working but it actually not ,it just works on the game guardian interface.. I can't see that window on any game or a program.. So I can't edit things as the game closes when I try to switch back to game guardian app to edit values just because that floating window isn't showing on the games, when I click show floating window from the notification bar..nothing happens.. I tried all the fixes from the given ones and nothing worked