I came across this middleman package and tried to run it with bundle exec middleman server
but get this back in the terminal...
The source :rubygems is deprecated because HTTP requests are insecure. Please change your source to 'https://rubygems.org' if possible, or 'http://rubygems.org' if not.
== The Middleman is loading
== Port 4567 is unavailable. Either close the instance of Middleman already running on 4567 or start this Middleman on a new port with: --port=4568
Thanks in advance!