WebGL set sprite error

Hi. Strange error I have:

Invoking error handler due to
uncaught exception: abort(190) at jsStackTrace
stackTrace
abort
nullFunc_iiii
b190
__ZN16VirtFuncInvoker1IbP12Il2CppObjectE6InvokeEjPvS1_ [VirtFuncInvoker1<bool, Il2CppObject*>::Invoke(unsigned int, void*, Il2CppObject*)]
_SetPropertyUtility_SetClass_TisIl2CppObject_m3678588200_gshared
_Image_set_sprite_m1800056820
_UIColor_Set_m1191744180
_UIColor_Start_m1773066424

My code in this line:

ThrumbBg.sprite = SharedScript2.Instance.GlobalColors.ThrumbBgTexture;

It work normaly in other types of build (android, win…)

I found. Error in SharedScript2 (singleton) static constructor.