Compile Unreal with HTML5

Hello everybody,
I’m trying to compile ue4 to allow HTML5 support, since it is no longer a feature included in the official release, I’m following the guide on this github project of the unreal users community.

The problem is that I receive this output warning and then the script freeze at this point.

It happens when I execute this file:


Has anyone done this before and knows how to fix it?

Thank you!