gerrit setup error

[developerinlondon]

$ gerrit setup
undefined method `[]' for nil:NilClass
/Users/nayeems/.rvm/gems/ruby-2.2.5/gems/gerrit-0.11.1/lib/gerrit/repo.rb:91:in `block in remotes'
/Users/nayeems/.rvm/gems/ruby-2.2.5/gems/gerrit-0.11.1/lib/gerrit/repo.rb:89:in `map'
/Users/nayeems/.rvm/gems/ruby-2.2.5/gems/gerrit-0.11.1/lib/gerrit/repo.rb:89:in `remotes'
/Users/nayeems/.rvm/gems/ruby-2.2.5/gems/gerrit-0.11.1/lib/gerrit/command/setup.rb:6:in `execute'
/Users/nayeems/.rvm/gems/ruby-2.2.5/gems/gerrit-0.11.1/lib/gerrit/command/base.rb:43:in `run'
/Users/nayeems/.rvm/gems/ruby-2.2.5/gems/gerrit-0.11.1/lib/gerrit/cli.rb:51:in `run_command'
/Users/nayeems/.rvm/gems/ruby-2.2.5/gems/gerrit-0.11.1/lib/gerrit/cli.rb:32:in `run'
/Users/nayeems/.rvm/gems/ruby-2.2.5/gems/gerrit-0.11.1/bin/gerrit:7:in `<top (required)>'
/Users/nayeems/.rvm/gems/ruby-2.2.5/bin/gerrit:23:in `load'
/Users/nayeems/.rvm/gems/ruby-2.2.5/bin/gerrit:23:in `<main>'
/Users/nayeems/.rvm/gems/ruby-2.2.5/bin/ruby_executable_hooks:15:in `eval'
/Users/nayeems/.rvm/gems/ruby-2.2.5/bin/ruby_executable_hooks:15:in `<main>'
Report this bug at https://github.com/sds/gerrit/issues

To help fix this issue, please include:
- The above stack trace
- Ruby version: 2.2.5