I had same error. Then I changed the Kws to Palapa (Android-google play) is free. Put www folder inside pws/www. Then source folder is pws/www/www.
Open app, start web server. Its works for me ok.
I live maybe 3 minutes from a Dairy Queen, so I would just go there for ice cream anything anyways. I usually get the Oreo Blizzard, or a Peanut Buster Parfait.