XCAM LG (xdabbebs LG G2 version) on G4?

How can I get XCAM LG on my VS968 on 5.1 rooted? (13b)? I don't care for stock G4 camera and over time was pretty custom to my G2 on the 4.4 xdabbeb VS980 Rom.... I found the 5.1 APK and installed it but it Fails to open...