Please help back button won't work so

[T_ninja]

So I'm a rooted user I have a Samsung galaxy s4 (i9505) and I install twrp and now my back button won't work please help

 

[itguyjax8430]

So I'm a rooted user I have a Samsung galaxy s4 (i9505) and I install twrp and now my back button won't work please help

Welcome to Android Central!

The back button won't work while in TWRP or while booted in to the OS?