Question

I installed rails admin and am getting an error when trying to access /admin:

My Gemfile:

source 'https://rubygems.org'

gem 'rails', '3.2.11'

gem 'devise'
gem 'rails_admin'

gem 'pg'
gem 'haml'

group :assets do
  gem 'sass-rails',   '~> 3.2.3'
  gem 'coffee-rails', '~> 3.2.1'

  gem 'therubyracer'
  gem 'less-rails'
  gem 'coffee-script'

  gem 'uglifier', '>= 1.0.3'
end

I have custom less styles in app/assets/stylesheets/*

Answer 1

Turned out to be twitter bootstrap & rails admin incompatibility.

Rails admin tried to load the bootstrap.less located in app/assets/stylesheets.

Solution: Rename bootstrap.less to bootstrap-mine.less.