Running "bundle exec rake spree_i18n:stats" crashes

gistfile1.txt

** Invoke spree_i18n:stats (first_time)
** Execute spree_i18n:stats
rake aborted!
undefined method `/' for nil:NilClass
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/bundler/gems/spree_i18n-f3dda132debe/lib/spree/i18n_utils.rb:22:in `block in create_hash'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/bundler/gems/spree_i18n-f3dda132debe/lib/spree/i18n_utils.rb:18:in `each'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/bundler/gems/spree_i18n-f3dda132debe/lib/spree/i18n_utils.rb:18:in `create_hash'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/bundler/gems/spree_i18n-f3dda132debe/lib/spree/i18n_utils.rb:9:in `read_file'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/bundler/gems/spree_i18n-f3dda132debe/lib/tasks/i18n.rake:59:in `block (3 levels) in <top (required)>'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/bundler/gems/spree_i18n-f3dda132debe/lib/tasks/i18n.rake:54:in `each'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/bundler/gems/spree_i18n-f3dda132debe/lib/tasks/i18n.rake:54:in `block (2 levels) in <top (required)>'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain'
/Users/[username_here]/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block (2 levels) in top_level'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block in top_level'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `block in run'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/bin/rake:19:in `load'
/Users/[username_here]/.rvm/gems/ruby-1.9.2-p290@[my_project_name_here]/bin/rake:19:in `<main>'