Hello and Happy New Year :)
I am having the same Problem, using the latest Winbuilder Win10PE SE and Windows 10 x64 1607 ISO.
The message says Windows Source Architecture not supported (ARCH=)!!!. Exiting .
This pops up when the play button reaches the "Images Configuration" line on the left.
Also if I go manually and choose the "Preconfig" line on the left and press the Green Go Button on the Right, it says "Error with mounting source , Install.wim"
I did download the ADK files but that doesn't help. Do I miss something else?
Thanks in advance,