I like this new transformer in Workbench 2016.1, the
HTMLReportGenerator, and I like the OSM Leaflet background map provided
by MapQuest. But unfortunately: as of July 11, 2016, MapQuest has
discontinued direct tile access to it's legacy maps. See: http://devblog.mapquest.com/2016/06/15/modernization-of-mapquest-results-in-changes-to-open-tile-access/
A quick solution would be to replace the L.tileLayer in the resulting html file with:
L.tileLayer('http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {attribution: 'Map data © <a href="http://openstreetmap.org">OpenStreetMap</a> contributors'})
(This will give the a background map with the default - not very nice - OpenStreetMap layout...)
Maybe a better plan would be to sign up for one of the free or non-free plans offered by MapQuest.