Mobile site: No Navigation Menu

I am currently working on homestead hosted site (dentist409.com).

When I go to the "free" mobile site builder via dubamobile to convert my site into a mobile friendly site, I go to Duda dashboard, step 2 (edit Navigation Menu) and the large window allowing for navigation choices from my desktop website is blank. Nothing for me to choose from my homestead site navigation menus (in my header bar) show up anywhere. If I have no navigation menu moving from my website to duda , I have no mobile phone website.

Please help!

Thanks.