(<unknown>): не удалось найти ожидаемый ':' при сканировании простого ключа в строке 3 столбца 1 (Psych:: SyntaxError)

Я пытаюсь запустить установку пакета в проекте рельсов, вытащенном из git. Когда я запускаю установку пакета, я получаю следующую ошибку:

    /Users/jordandeutsch/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/psych.rb:370:in     `parse': (<unknown>): could not find expected ':' while scanning a simple key at     line 3 column 1 (Psych::SyntaxError)
    from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/psych.rb:370:in `parse_stream'
    from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/psych.rb:318:in `parse'
    from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/psych.rb:245:in `load'
    from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/config_file.rb:333:in `load_file'
    from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/config_file.rb:198:in `initialize'
    from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/gem_runner.rb:74:in `new'
    from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/gem_runner.rb:74:in `do_configuration'
    from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/gem_runner.rb:39:in `run'
    from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.1/bin/gem:21:in `<main>'

Это мой Gemfile:

source 'https://rubygems.org'


# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.2.3'
# Use sqlite3 as the database for Active Record
gem 'sqlite3'

#for Authentification
gem 'devise'

#for image management
gem 'paperclip', :git => 'git://github.com/thoughtbot/paperclip.git'
gem 'aws-sdk-v1'
gem 'aws-s3'

group :development do
    gem 'better_errors'
end

group :development, :test do
    gem 'dotenv-rails'
end
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.1.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more:     https://github.com/rails/turbolinks
gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'
# bundle exec rake doc:rails generates the API under doc/api.
gem 'sdoc', '~> 0.4.0', group: :doc

# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Unicorn as the app server
# gem 'unicorn'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger     console
  gem 'byebug'

  # Access an IRB console on exception pages or by using <%= console %> in views
  gem 'web-console', '~> 2.0'

  # Spring speeds up development by keeping your application running in the      background. Read more: https://github.com/rails/spring
  gem 'spring'
end

После некоторого рытья я подумал, что это может быть проблемой с rvm, поскольку я пытался вытащить старый проект с git и по-прежнему не смог запустить установку пакета. Я также попытался скопировать проект локально и запустить установку и начать новый проект без успеха.

После переустановки rvm я запустил rvm use ruby --install --default и получил следующую ошибку (аналогично предыдущей)

/Users/jordandeutsch/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/psych.rb:370:in `parse': (<unknown>): could not find expected ':' while scanning a simple key at line 3 column 1 (Psych::SyntaxError)
from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/psych.rb:370:in `parse_stream'
from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/psych.rb:318:in `parse'
from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/psych.rb:245:in `load'
from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/config_file.rb:333:in `load_file'
from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/config_file.rb:198:in `initialize'
from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/gem_runner.rb:74:in `new'
from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/gem_runner.rb:74:in `do_configuration'
from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/gem_runner.rb:39:in `run'
from /Users/jordandeutsch/.rvm/rubies/ruby-2.2.3/bin/gem:25:in `<main>'

По сути, я не могу начать новый проект рельсов на компьютере. Любое понимание было бы оценено.

Ответы

default: &default
 FOO_KEY: 'XXXXX'

development:
  <<: *default

test:
  <<: *default

default: &default
  FOO_KEY: 'asdf'
  BAR_KEY: 'XXXXXXXXXXX'
  FOO_BAR: 'XXXXXXXXXXXX'

development:
  <<: *default

test:
  <<: *default

/home/abhishek/.rvm/gems/ruby-2.3.7/gems/railties-4.2.10/lib/rails/application/configuration.rb:115:in 'rescue in database_configuration': YAML syntax error occurred while parsing /home/abhishek/Workspace/clearfunds/clearfunds-web/config/database.yml. Please note that YAML must be consistently indented using spaces. Tabs are not allowed. Error: (<unknown>): could not find expected ':' while scanning a simple key at line 19 column 7 (RuntimeError)