Failed to Build for WebGL.I am using unity 5.6.1f1.

I am getting 3 errors.Here is log

Failed running C:\Program Files\Unity\Editor\Data\il2cpp/build/il2cpp.exe --convert-to-cpp --compile-cpp --libil2cpp-static --platform="WebGL" --architecture="EmscriptenJavaScript" --configuration="Release" --outputpath="D:\Unity projects\testing\Assets /../Temp/StagingArea/Data\Native\build.bc" --cachedirectory="D:\Unity projects\testing\Assets..\Library/il2cpp_cache" --compiler-flags="-Oz -DIL2CPP_EXCEPTION_DISABLED=1 " --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_AIModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_AnimationModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_AudioModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_ClothModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_CloudWebServicesModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_CoreModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_CrashReportingModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_FacebookModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_IMGUIModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_InputModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_JSONSerializeModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_ParticlesLegacyModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_ParticleSystemModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_PerformanceReportingModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_Physics2DModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_PhysicsModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_TerrainModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_TerrainPhysicsModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_TextRenderingModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_UIModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_UmbraModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_UNETModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_UnityAdsModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_UnityAnalyticsModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_UnityConnectModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_UnityWebRequestAudioModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_UnityWebRequestModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_VehiclesModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_VideoModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_VRModule_Dynamic.bc" --additional-libraries="C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\lib\modules\WebGLSupport_WebModule_Dynamic.bc" --map-file-parser="C:\Program Files\Unity\Editor\Data\Tools\MapFileParser\MapFileParser.exe" --assembly="D:\Unity projects\testing\Temp\StagingArea\Data\Managed\Assembly-CSharp.dll" --assembly="D:\Unity projects\testing\Temp\StagingArea\Data\Managed\UnityEngine.UI.dll" --assembly="D:\Unity projects\testing\Temp\StagingArea\Data\Managed\UnityEngine.dll" --generatedcppdir="D:\Unity projects\testing\Temp\StagingArea\Data\il2cppOutput"

stdout: Building build.bc with EmscriptenToolChain. Output directory: D:\Unity projects\testing\Temp\StagingArea\Data\Native Cache directory: D:\Unity projects\testing\Library\il2cpp_cache il2cpp.exe didn't catch exception: Unity.IL2CPP.Building.BuilderFailedException: CRITICAL:root:Could not verify LLVM version: argument of type 'NoneType' is not iterable CRITICAL:root:fastcomp in use, but LLVM has not been built with the JavaScript backend as a target, llc reports: =========================================================================== (no targets could be identified: need more than 1 value to unpack) =========================================================================== CRITICAL:root:you can fall back to the older (pre-fastcomp) compiler core, although that is not recommended, see http://kripken.github.io/emscripten-site/docs/building_from_source/LLVM-Backend.html INFO:root:(Emscripten: Running sanity checks) CRITICAL:root:failing sanity checks due to previous fastcomp failure

Invocation was: Executable: "C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten_Win\python\2.7.5.3_64bit\python.exe" Arguments: "C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\em++" -Wno-unused-value -Wno-invalid-offsetof -nostdinc -fno-strict-overflow -std=c++11 -Oz -DIL2CPP_EXCEPTION_DISABLED=1 -DNDEBUG -I"C:\Program Files\Unity\Editor\Data\il2cpp\libil2cpp" -I"C:\Program Files\Unity\Editor\Data\il2cpp\external\boehmgc\include" -I"D:\Unity projects\testing\Temp\StagingArea\Data\il2cppOutput" "D:\Unity projects\testing\Temp\StagingArea\Data\il2cppOutput\Bulk_mscorlib_6.cpp" -o "D:\Unity projects\testing\Library\il2cpp_cache\923FE81B7A6C7F11FADE910414FAC1FC.o"

at Unity.IL2CPP.Building.CppProgramBuilder.BuildAllCppFiles(IEnumerable`1 sourceFilesToCompile, IBuildStatisticsCollector statisticsCollector) at Unity.IL2CPP.Building.CppProgramBuilder.Build(IBuildStatistics& statistics) at Unity.IL2CPP.Building.Statistics.BuildingTestRunnerHelper.BuildAndLogStatsForTestRunner(CppProgramBuilder builder, IBuildStatistics& statistics) at il2cpp.Program.DoRun(String[] args) at il2cpp.Program.Run(String[] args) at il2cpp.Program.Main(String[] args) stderr:

Unhandled Exception: Unity.IL2CPP.Building.BuilderFailedException: CRITICAL:root:Could not verify LLVM version: argument of type 'NoneType' is not iterable CRITICAL:root:fastcomp in use, but LLVM has not been built with the JavaScript backend as a target, llc reports: =========================================================================== (no targets could be identified: need more than 1 value to unpack) =========================================================================== CRITICAL:root:you can fall back to the older (pre-fastcomp) compiler core, although that is not recommended, see http://kripken.github.io/emscripten-site/docs/building_from_source/LLVM-Backend.html INFO:root:(Emscripten: Running sanity checks) CRITICAL:root:failing sanity checks due to previous fastcomp failure

Invocation was: Executable: "C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten_Win\python\2.7.5.3_64bit\python.exe" Arguments: "C:\Program Files\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\em++" -Wno-unused-value -Wno-invalid-offsetof -nostdinc -fno-strict-overflow -std=c++11 -Oz -DIL2CPP_EXCEPTION_DISABLED=1 -DNDEBUG -I"C:\Program Files\Unity\Editor\Data\il2cpp\libil2cpp" -I"C:\Program Files\Unity\Editor\Data\il2cpp\external\boehmgc\include" -I"D:\Unity projects\testing\Temp\StagingArea\Data\il2cppOutput" "D:\Unity projects\testing\Temp\StagingArea\Data\il2cppOutput\Bulk_mscorlib_6.cpp" -o "D:\Unity projects\testing\Library\il2cpp_cache\923FE81B7A6C7F11FADE910414FAC1FC.o"

at Unity.IL2CPP.Building.CppProgramBuilder.BuildAllCppFiles(IEnumerable`1 sourceFilesToCompile, IBuildStatisticsCollector statisticsCollector) at Unity.IL2CPP.Building.CppProgramBuilder.Build(IBuildStatistics& statistics) at Unity.IL2CPP.Building.Statistics.BuildingTestRunnerHelper.BuildAndLogStatsForTestRunner(CppProgramBuilder builder, IBuildStatistics& statistics) at il2cpp.Program.DoRun(String[] args) at il2cpp.Program.Run(String[] args) at il2cpp.Program.Main(String[] args)

UnityEngine.Debug:LogError(Object) UnityEditorInternal.Runner:RunManagedProgram(String, String, String, CompilerOutputParserBase, Action`1) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/BuildUtils.cs:96) UnityEditorInternal.IL2CPPBuilder:RunIl2CppWithArguments(List`1, Action`1, String) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:313) UnityEditorInternal.IL2CPPBuilder:ConvertPlayerDlltoCpp(ICollection`1, String, String) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:304) UnityEditorInternal.IL2CPPBuilder:Run() (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:151) UnityEditorInternal.IL2CPPUtils:RunIl2Cpp(String, IIl2CppPlatformProvider, Action`1, RuntimeClassRegistry, Boolean) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:41) UnityEditor.BuildPlayerWindow:BuildPlayerAndRun()