I am having this same problem also. First time working with "Build A Pi". It either looks like the onboard wireless is disabled. Keeps saying no wireless interfaces available when I go to the networking icon in the taskbar. Any suggestions on where I am going wrong in setting up the Hotspot feature on the Pi? Going to keep at it and will post what I figure out here. Linux is a new path for me at this point.
Chris Schulz
NR9Q