Undefined method environment for nil:NilClass

[arijoon]

After installing this gem I received the flowing error:

undefined method `environment' for nil:NilClass

Which links to framework_and_overrides.css.scss! I tried removing the gem without any changes to other files and everything works fine again. I was unable to debug this problem but the error is raised during stylesheets import on this line:

<%= stylesheet_link_tag "application", media: "all", "data-turbolinks-track" => "true"   %>