When I compile html5 version error ! According to Getting Started: Developing HTML5 Projects for installation .
I have installed Emscripten 1.25.0，and Nightly Firefox。My unreal version is 4.6 .
2> [148/154] python.exe UE4Game-ScriptPlugin-Static.bc
2> [149/154] python.exe UE4Game-Paper2D-Static.bc
2> [150/154] python.exe UELinkerFixups.cpp
2> [151/154] python.exe AutoStartupModuleListGetter.generated.cpp
2> [152/154] python.exe UE4Game-CharacterAI-Static.bc
2> INFO root: (Emscripten: Running sanity checks)
2> INFO root: (Emscripten: Running sanity checks)
2> INFO root: (Emscripten: Running sanity checks)
2> [153/154] python.exe UE4Game-ExampleDeviceProfileSelector-Static.bc
2> INFO root: (Emscripten: Running sanity checks)
2> INFO root: (Emscripten: Running sanity checks)
2> [154/154] python.exe UE4Game.js
2> INFO root: (Emscripten: Running sanity checks)
2>EXEC : error root: D:\UnrealEngine-46S\Engine\Source\ThirdParty\ICU\icu4c-53_1\HTML5\libicudata.bc: No such file or directory ("D:\UnrealEngine-46S\Engine\Source\ThirdParty\ICU\icu4c-53_1\HTML5\libicudata.bc" was expected to be an input file, based on the commandline arguments provided)
2> -------- End Detailed Actions Stats -----------------------------------------------------------
2>ERROR : UBT error : Failed to produce item: D:\UnrealEngine-46S\Engine\Binaries\HTML5\UE4Game.js
2> Cumulative action seconds (12 processors): 0.00 building projects, 1585.87 compiling, 0.00 creating app bundles, 0.00 generating debug info, 10.31 linking, 0.00 other
2> UBT execution time: 342.96 seconds