HTML 5 Error on web browser

Hi, i get this error after trying to launch a project in mozilla nightly and chrome. I use the HTML5LaunchHelper.exe

No errors while packaging the project. I also get the error when i try to launch from the unreal engine.
Any ideas of what is the cause and how to resolve it?

http://puu.sh/wYRnn/0d2c4e17d0.png

This could be something project specific. You could try debugging by searching the ASM_CONSTS section in the .asm.js file for the functions and seeing which one throws. Does exporting any of the built-in minimal template projects work? Any chance the project is public to try to reproduce?