I can't luaunch or package my project!

Hi, I don’t know how i got that error (Never got that before!) so i just finished my game and i wanted to package it then i got error like this:


UATHelper: Packaging (Windows (64-bit)): ERROR: Windows SDK v8.1 must be installed in order to build this target.(I have windows 10 SDK already downloaded!!!) UATHelper: Packaging (Windows (64-bit)): ERROR: Command failed (Result:5): C:\Program Files\Epic Games\UE_4.19\Engine\Binaries\DotNET\UnrealBuildTool.exe project_idiot_2 Win64 Development -Project=“C:\Users\OneDrive\Documents\Unreal Projects\project_idiot_2\project_idiot_2.uproject” “C:\Users\OneDrive\Documents\Unreal Projects\project_idiot_2\pr
oject_idiot_2.uproject” -NoUBTMakefiles -remoteini=“C:\Users\OneDrive\Documents\Unreal Projects\project_idiot_2” -skipdeploy -noxge -NoHotReload -ignorejunk. See logfile for details: ‘UnrealBuildTool-2018.05.21-21.35.12.txt’ nd failed (Result:5): C:\Program Files\Epic Games\UE_4.19\Engine\Binaries\DotNET\UnrealBuildTool.exe project_idiot_2 Win64 Development -Project=“C:\Users\OneDrive\Documents\Unreal Projects\project_idiot_2\project_idiot_2.uproject” “C:\Users\OneDrive\Documents\Unreal Projects\project_idiot_2\project_idiot_2.uproject”
-NoUBTMakefiles -remoteini=“C:\Users\OneDrive\Documents\Unreal Projects\project_idiot_2” -skipdeploy -noxge -NoHotReload -ignorejunk. See logfile for details: ‘UnrealBuildTool-2018.05.21-21.35.12.txt’ PackagingResults: Error: Unknown Error (Those are red texts)


Can someone help me? And launching the game i’m getting same error need help!!