[web2py] unable to install application KPAX

I tried to load the KPAX2 example app from: https://github.com/mdipierro/web2py-appliances/blob/master/KPax2/web2py.app.KPax2.w2p and I it kept telling me: unable to install application KPAX I don't know where to look for further details about WHY? Rufus (I tried loading it to PythonAnywhere

[web2py] Unable to install application kpax

Following the web2py book, chapter 03 Overview, I try to install KPAX via the Admin page. Admin show version 1.97.1. Under upload and install packed application I provide URL http://web2py.com/appliances/default/download/app.source.221663266939.tar as in the book - I get Unable to install