Failed to find shader map for default material WorldGridMaterial!

On some android device, I got this error below. How can I ‘make sure’ cooking was succeed? I removed Saved and Intermediate folder but it wasn’t helped.

Testing device is LG Optimus LTE 2. (Match-3 example was run normally.)

D/UE4     (27817): Fatal error: [File:D:\BuildFarm\buildmachine_++UE4+Release-4.11\Engine\Source\Runtime\Engine\Private\Materials\MaterialShared.cpp] [Line: 1398]
D/UE4     (27817): Failed to find shader map for default material WorldGridMaterial!  Please make sure cooking was successful.
D/UE4     (27817): [2016.05.18-12.43.18:296][  0]Assertion failed: Assertion failed:  [File:D:\BuildFarm\buildmachine_++UE4+Release-4.11\Engine\Source\Runtime\Engine\Private\Materials\MaterialShared.cpp] [Line: 1398]
D/UE4     (27817): Failed to find shader map for default material WorldGridMaterial!  Please make sure cooking was successful.

Thanks for helping.

Solved. My r.MobileHDR option in DefaultDeviceProfile.ini was differ from Project Setting’s. It caused problem.