Rails 4.1.0.beta issue

I'm just trying out the rails 4.1.0.beta and I got this error when starting server:

    /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/figaro-4241288146ed/lib/figaro.rb:29:in `path': undefined method `join' for nil:NilClass (NoMethodError)
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/figaro-4241288146ed/lib/figaro.rb:25:in `yaml'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/figaro-4241288146ed/lib/figaro.rb:21:in `raw'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/figaro-4241288146ed/lib/figaro.rb:17:in `env'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/figaro-4241288146ed/lib/figaro/railtie.rb:7:in `block in <class:Railtie>'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/rails-4f5f59a492bd/activesupport/lib/active_support/lazy_load_hooks.rb:36:in `call'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/rails-4f5f59a492bd/activesupport/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/rails-4f5f59a492bd/activesupport/lib/active_support/lazy_load_hooks.rb:45:in `block in run_load_hooks'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/rails-4f5f59a492bd/activesupport/lib/active_support/lazy_load_hooks.rb:44:in `each'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/rails-4f5f59a492bd/activesupport/lib/active_support/lazy_load_hooks.rb:44:in `run_load_hooks'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/rails-4f5f59a492bd/railties/lib/rails/application.rb:118:in `initialize'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/rails-4f5f59a492bd/railties/lib/rails/railtie.rb:171:in `new'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/rails-4f5f59a492bd/railties/lib/rails/railtie.rb:171:in `instance'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/rails-4f5f59a492bd/railties/lib/rails/application.rb:88:in `inherited'
	from /Users/mr_foto/my/path/to/app/config/application.rb:10:in `<module:AppName>'
	from /Users/mr_foto/my/path/to/app/config/application.rb:9:in `<top (required)>'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/rails-4f5f59a492bd/railties/lib/rails/commands/commands_tasks.rb:75:in `require'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/rails-4f5f59a492bd/railties/lib/rails/commands/commands_tasks.rb:75:in `block in server'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/rails-4f5f59a492bd/railties/lib/rails/commands/commands_tasks.rb:72:in `tap'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/rails-4f5f59a492bd/railties/lib/rails/commands/commands_tasks.rb:72:in `server'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/rails-4f5f59a492bd/railties/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
	from /Users/mr_foto/.rvm/gems/ruby-2.0.0-p247/bundler/gems/rails-4f5f59a492bd/railties/lib/rails/commands.rb:17:in `<top (required)>'
	from bin/rails:4:in `require'
	from bin/rails:4:in `<main>'