Error when trying to load the 'google/api_client'

[bmt8]

Whenever I try to execute the bundle exec ruby analytics.rb I get the error:

analytics.rb:3:in `require': cannot load such file -- google/api_client (LoadError)
    from analytics.rb:3:in `<main>'

I've already installed the google-api-client gem and the it is also inside the gemfile...