After reboot Sunstone won't start

Community Support GUI - Sunstone
1

Just rebooted a front end and now Sunstone won’t load, I have this error in the logs:
Any ideas ?

sunstone.error

/usr/lib/one/sunstone/models/sunstone_guac.rb:29: warning: already initialized constant VAR_LOCATION
/usr/lib/one/sunstone/sunstone-server.rb:24: warning: previous definition of VAR_LOCATION was here
== Sinatra (v2.1.0) has taken the stage on 80 for production with backup from Thin
== Sinatra has ended his set (crowd applauds)
/usr/share/one/gems-dist/gems/eventmachine-1.2.7/lib/eventmachine.rb:531:in `start_tcp_server': no acceptor (port is in use or requires root privileges) (RuntimeError)
	from /usr/share/one/gems-dist/gems/eventmachine-1.2.7/lib/eventmachine.rb:531:in `start_server'
	from /usr/share/one/gems-dist/gems/thin-1.8.0/lib/thin/backends/tcp_server.rb:16:in `connect'
	from /usr/share/one/gems-dist/gems/thin-1.8.0/lib/thin/backends/base.rb:65:in `block in start'
	from /usr/share/one/gems-dist/gems/eventmachine-1.2.7/lib/eventmachine.rb:195:in `run_machine'
	from /usr/share/one/gems-dist/gems/eventmachine-1.2.7/lib/eventmachine.rb:195:in `run'
	from /usr/share/one/gems-dist/gems/thin-1.8.0/lib/thin/backends/base.rb:75:in `start'
	from /usr/share/one/gems-dist/gems/thin-1.8.0/lib/thin/server.rb:162:in `start'
	from /usr/share/one/gems-dist/gems/rack-2.2.3/lib/rack/handler/thin.rb:22:in `run'
	from /usr/share/one/gems-dist/gems/sinatra-2.1.0/lib/sinatra/base.rb:1565:in `start_server'
	from /usr/share/one/gems-dist/gems/sinatra-2.1.0/lib/sinatra/base.rb:1499:in `run!'
	from /usr/lib/one/sunstone/sunstone-server.rb:1206:in `<main>'
2

Can you check who are already used the port?

3

There aren’t any processes using port 80. There is some kind of permissions issue. All of the installs we have done using miniONE have this issue intermittently / usually after reboot.