HTML 5 Script Error

Development Platform & Builds
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14

I create simple FPS test scene without additional geometry but I still have the same error. I’m using UE4 4.8.3 and emscripten 1.29

But when I install emscripten 1.29, some error appears and program install version 1.34.
In prompt window I do the next steps:

  1. emsdk install sdk-1.29.0-64bit
  2. emsdk activate sdk-1.29.0-64bit
    and it’s ok.

In Unreal Engine I choose emscripten 1.29 and package is successfully complete.
In FF appears error as above.