Tests which require Service Manager will not work on Windows. The following workaround is recommended.

add another gem, childprocess, to your Gemfile:

  gem 'childprocess'

In your features/support directory, add a script to start and stop the backend service:
features/support/services.rb
 
  require 'childprocess'
  process = ChildProcess.build('ruby', 'lib/transaction_processor.rb') process.start
  at_exit { process.stop }