Hi,
Thanks for contacting support.
I have Win10 v1803
VS Community 2017 15.9.5
Just tried compiling engine using Esenthel Builder \ "Compile Windows All"
However I can't reproduce your error, it compiles fine.
Perhaps VS installation needs to be configured to include some ARM support which is not installed on your system?
Anyway, if you don't need ARM support (Windows Phone), then you can ignore this error.
The "ARM\Release Universal DX11" is the last step in "Compile Windows All", so if it fails on that step, then it means all other Windows targets (previous steps) compiled successfully (which are Desktop and UWP 32/64).
As for Ineisis Online, for publishing, it was configured to be uploaded to servers, and downloaded using the launcher first.
You can read the documentation here:
http://www.esenthel.com/?id=doc#Ineisis/Overview
and the following pages
However if you run in Debug mode, then it can be run without the upload/download.