when run dedicated server, can't load editor only asset

i create a dedicated server from sample shootergame, but it crashed when run it.

[2017.11.09-09.51.24:999][ 0]LogLinker:Warning: Unable to load package (…/…/…/…/UnrealEngine/UnrealEngine-4.16.0-release/…/…/Unreal Projects/ShooterGame/Content/Blueprints/Pawns/PlayerPawn.uasset). Package contains EditorOnly data which is not supported by the current build.

[2017.11.09-09.51.25:001][ 0]Error: CDO Constructor (ShooterGameMode): Failed to find /Game/Blueprints/Pawns/PlayerPawn.PlayerPawn_C

[2017.11.09-09.51.25:275][ 0]LogLinker:Warning: Unable to load package (…/…/…/…/UnrealEngine/UnrealEngine-4.16.0-release/Engine/Content/EngineMaterials/WorldGridMaterial.uasset). Package contains EditorOnly data which is not supported by the current build.

Assertion failed: GDefaultMaterials[Domain] != NULL [File:F:\UnrealEngine\UnrealEngine-4.16.0-release\Engine\Source\Runtime\Engine\Private\Materials\Material.cpp] [Line: 429]

Cannot load default material ‘engine-ini:/Script/Engine.Engine.DefaultMaterialName’

I have the blueprint in my packaged folder, but it can’t find the blueprint.

is something set wrong?
Any help or hints would be appreciated.

thanks.