uninitialized constant ErrbitGitlabPlugin::ErrbitPlugin (NameError)

[JohnMerlino1]

How am I supposed to use this? I installed the gem, but I do not know what to do next. How am I supposed to integrate this? In fact, the only thing I get is an error when running rails console or rails server:

$ rails c
/Users/myuser/.rvm/gems/ruby-2.1.2@core/gems/errbit_gitlab_plugin-0.1.0/lib/errbit_gitlab_plugin/issue_tracker.rb:4:in <module:ErrbitGitlabPlugin>': uninitialized constant ErrbitGitlabPlugin::ErrbitPlugin (NameError) from /Users/myuser/.rvm/gems/ruby-2.1.2@core/gems/errbit_gitlab_plugin-0.1.0/lib/errbit_gitlab_plugin/issue_tracker.rb:3:in<top (required)>'

[stevecrozz]

The idea here is that you add this gem to Errbit's UserGemfile like this:
https://github.com/errbit/errbit#plugins-and-integrations