Is it named “default.sitemap”? If not I think your URL should be
http://10.0.0.1:8080/basicui/app?sitemap=sitename
where “sitename” is the first part of the name of your sitemap file.
At least it would be something like that on OH 1.x
You’re A Genius ! Finally Everything At Least Show Up ! 
& The URL : http://10.0.0.1:8080/basicui/app?sitemap=
Lists All Of The Available Sitemaps.
While OpenHAB Is, IMHO, Quite a Weird Beast & It’s Documentation Is Even More So…
At Least It Has Knowledgeable Community Members : Thanks People ! 