Sidekiq UI : Internal Server Error production

I am trying to run Sidekiq UI in production mode, though the workers are running fine but sometimes they crash and hence I wanted to look at the UI to either restart them or see whats the issue. This only is a problem in production mode, the dev mode works flawlessly!

But when I access /sidekiq UI I always end up getting a Internal Server Error and I can't seem to get any backtrace either in my log/sidekiq.log or log/production.log in my rails app.

What's the best way to get this working or atleast get me the backtrace!

Gemfile:

gem 'sidekiq', '0.7.0' #I am using sidetiq for schedulinggem 'sidekiq-middleware', '0.3.0'gem 'sinatra', :require => nil

Command to start sidekiq

bundle exec sidekiq -d -L log/sidekiq.log -C config/sidekiq.yml -e production

Sidekiq log has this output always (if any helpful)

Can't link Sidetiq::Actor::Handler. Sidekiq::Manager not running. Retrying in 5 seconds ...Can't link Sidetiq::Actor::Handler. Sidekiq::Manager not running. Retrying in 5 seconds ...Can't link Sidetiq::Actor::Handler. Sidekiq::Manager not running. Retrying in 5 seconds ...DEBUG: [Sidetiq] Can't link Sidetiq::Actor::Clock. Sidekiq::Manager not running. Retrying in 5 seconds ...Sidetiq] Lock: sidetiq:MyAwesomeWorker:lock[Sidetiq] Enqueue: MyAwesomeWorker (at: 1458064200.0) (last: 1458064140.0)Sidetiq] Unlock: sidetiq:MyAwesomeWorker:lock