fix: rename ::Server to something different e.g. App/Engine/etc. use Server only for web server (e.g. Thin, Unicorn, Apache, etc.)
map '/db' do
run PlutoAdmin::Server
end
make sure just 'pluto/admin' works; no need for "extra" 'pluto/admin/server'
boot.rb:
require 'pluto/admin' ### fix: load pluto admin here (remove pluto/admin/server !!!)
require 'pluto/admin/server' # note: pluto admin server app (requires extra require)