Bitters issue: Undefined variable: "$helvetica"

I installed Bitters in a new Rails 4.0.0 app.

But when I try to visit a page, I’m getting this error message:

Undefined variable: “$helvetica”.
(in /Users/acandael/Sites/redesign/app/assets/stylesheets/bitters/_bitters.scss:3)
my application.css.scss file looks like this:

@import "bourbon";
@import "bitters/bitters";
@import "neat";

I’m using Haml for the app. The views/layouts/application.html.haml file looks like this:

    %title "Index"
    = stylesheet_link_tag    "application"
    = javascript_include_tag "application"
    = csrf_meta_tags
    = yield

I didn’t change or added somthing in the Bitters folder, so what could be the issue here?

Thanks for your help,


seems like was not the only one, having this issue: