HTML5 Build failed with LE Http Request

ok sure i will try to get a windows 7 to package it.
At the same time Mr.LE do you have any idea what does -
“Linking globals named ‘_Z14UELinkerFixupsv’: symbol multiply defined!” means?
could you explain a little bit more on this error for me?
what could possibly cause it?

i also have these errors from the output logs,-

UATHelper: Packaging (HTML5): error: Linking globals named ‘_Z14UELinkerFixupsv’: symbol multiply defined!
PackagingResults: Error: Linking globals named ‘_Z14UELinkerFixupsv’: symbol multiply defined!
UATHelper: Packaging (HTML5): ERROR:root:Failed to run llvm optimizations:
UATHelper: Packaging (HTML5): WARNING:root:Note: Input file “@C:\Users\tatur\AppData\Local\Temp\tmpvg0gxp.response” did not exist.
UATHelper: Packaging (HTML5): ERROR: UBT ERROR: Failed to produce item: D:\1. UE4 Projects\MyProject\Binaries\HTML5\MyProject.js
PackagingResults: Error: UBT ERROR: Failed to produce item: D:\1. UE4 Projects\MyProject\Binaries\HTML5\MyProject.js

Much appreciation and thanks.