Not working on Xs Max

[TozyZuo]

iOS:12.0.1
64G black xs max
move slider -> nothing happened

same code works fine on my 6s plus(12.1.1)

[TozyZuo]

GammaThingy crashed at
error = IOMobileFramebufferGetGammaTable(fb, data);
assert(error == 0);
Assertion failed: (error == 0), function +[GammaController setGammaWithRed:green:blue:], file GammaThingy-master/GammaTest/mvc/controller/GammaController.m, line 127
error == -536870201