terence@terence-MS-7921 ~/Documents/unimelb/iqualify-unimelb-backend-master $ rails server
/home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/voltos-0.3.2/lib/voltos.rb:27:in `load': undefined method `each' for nil:NilClass (NoMethodError)
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/voltos-0.3.2/lib/voltos/rails.rb:8:in `load'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/voltos-0.3.2/lib/voltos/rails.rb:16:in `load'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/voltos-0.3.2/lib/voltos/rails.rb:4:in `block in <class:Railtie>'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/activesupport-4.1.6/lib/active_support/lazy_load_hooks.rb:36:in `call'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/activesupport-4.1.6/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/activesupport-4.1.6/lib/active_support/lazy_load_hooks.rb:45:in `block in run_load_hooks'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/activesupport-4.1.6/lib/active_support/lazy_load_hooks.rb:44:in `each'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/activesupport-4.1.6/lib/active_support/lazy_load_hooks.rb:44:in `run_load_hooks'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/railties-4.1.6/lib/rails/application.rb:123:in `initialize'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/railties-4.1.6/lib/rails/railtie.rb:171:in `new'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/railties-4.1.6/lib/rails/railtie.rb:171:in `instance'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/railties-4.1.6/lib/rails/application.rb:90:in `inherited'
	from /home/terence/Documents/unimelb/iqualify-unimelb-backend-master/config/application.rb:10:in `<module:LtiToolProvider>'
	from /home/terence/Documents/unimelb/iqualify-unimelb-backend-master/config/application.rb:9:in `<top (required)>'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/railties-4.1.6/lib/rails/commands/commands_tasks.rb:79:in `require'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/railties-4.1.6/lib/rails/commands/commands_tasks.rb:79:in `block in server'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/railties-4.1.6/lib/rails/commands/commands_tasks.rb:76:in `tap'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/railties-4.1.6/lib/rails/commands/commands_tasks.rb:76:in `server'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/railties-4.1.6/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
	from /home/terence/.rvm/gems/ruby-2.2.1@iqualify-unimelb/gems/railties-4.1.6/lib/rails/commands.rb:17:in `<top (required)>'
	from bin/rails:4:in `require'
	from bin/rails:4:in `<main>'