Sass error active admin in Rails 5 - ruby-on-rails

Question

I trying to run my server but I have always the same error... I dont find the solution. I search in github and on google nothing work...
Do you have idea ?
rails s
/home/nicolas/.gem/ruby/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:94:in `rescue in block (2 levels) in require': There was an error while trying to load the gem 'sass-rails'. (Bundler::GemRequireError)
Gem Load Error is: uninitialized constant Sass::Script
Backtrace for gem load error is:
/home/nicolas/.gem/ruby/2.3.0/gems/sass-rails-5.0.6/lib/sass/rails/helpers.rb:12:in `<top (required)>'
/home/nicolas/.gem/ruby/2.3.0/gems/sass-rails-5.0.6/lib/sass/rails.rb:8:in `<top (required)>'
/home/nicolas/.gem/ruby/2.3.0/gems/sass-rails-5.0.6/lib/sass-rails.rb:1:in `<top (required)>'
/home/nicolas/.gem/ruby/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:91:in `require'
/home/nicolas/.gem/ruby/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:91:in `block (2 levels) in require'
/home/nicolas/.gem/ruby/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:86:in `each'
/home/nicolas/.gem/ruby/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:86:in `block in require'
/home/nicolas/.gem/ruby/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:75:in `each'
/home/nicolas/.gem/ruby/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:75:in `require'
/home/nicolas/.gem/ruby/2.3.0/gems/bundler-1.13.6/lib/bundler.rb:106:in `require'
/home/nicolas/Bureau/rails/site/campsite/config/application.rb:7:in `<top (required)>'
/home/nicolas/.gem/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:88:in `require'
/home/nicolas/.gem/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:88:in `block in server'
/home/nicolas/.gem/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in `tap'
/home/nicolas/.gem/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in `server'
/home/nicolas/.gem/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
/home/nicolas/.gem/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/commands.rb:18:in `<top (required)>'
bin/rails:4:in `require'
bin/rails:4:in `<main>'
Bundler Error Backtrace:
from /home/nicolas/.gem/ruby/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:90:in `block (2 levels) in require'
from /home/nicolas/.gem/ruby/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:86:in `each'
from /home/nicolas/.gem/ruby/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:86:in `block in require'
from /home/nicolas/.gem/ruby/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:75:in `each'
from /home/nicolas/.gem/ruby/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:75:in `require'
from /home/nicolas/.gem/ruby/2.3.0/gems/bundler-1.13.6/lib/bundler.rb:106:in `require'
from /home/nicolas/Bureau/rails/site/campsite/config/application.rb:7:in `<top (required)>'
from /home/nicolas/.gem/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:88:in `require'
from /home/nicolas/.gem/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:88:in `block in server'
from /home/nicolas/.gem/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in `tap'
from /home/nicolas/.gem/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in `server'
from /home/nicolas/.gem/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
from /home/nicolas/.gem/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/commands.rb:18:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
My gemfile
source 'https://rubygems.org'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.0.0'
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
#gem 'pg'
# Use Puma as the app server
gem 'puma', '~> 3.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.2'
#Recherche
gem 'elasticsearch-rails'
gem 'elasticsearch-model'
gem 'searchkick'
#Pagination
gem 'kaminari'
#Google map
gem 'gmaps4rails'
#Gem pour faciliter les scopes des recherches
gem 'has_scope'
gem 'record_tag_helper', '~> 1.0'
#Upload d'images
gem 'carrierwave'
#activeadmin
gem 'sass-rails'
gem 'activeadmin', '~> 1.0.0.pre4'
gem 'inherited_resources', :git => "https://github.com/activeadmin/inherited_resources.git"
gem 'ransack', :git => "https://github.com/activerecord-hackery/ransack.git"
gem 'draper', '> 3.x'
gem 'devise'
gem 'cancancan'
gem "rolify"
# Use jquery as the JavaScript library
gem 'jquery-rails'
gem 'jquery-ui-rails'
gem 'gmaps-autocomplete-rails'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.5'
#geocoder
gem 'geocoder'
#ImageUploader
gem "paperclip"
#friendly url
gem 'friendly_id'
#balise SEO
gem 'meta-tags'
#bootstrap
gem 'bootstrap-sass', '~> 3.3.6'
#Traduction
gem 'rails-i18n', '~> 5.0.0' # For 5.0.x
#mailboxer
gem 'mailboxer', :git => "https://github.com/mailboxer/mailboxer.git"
#uploadimage
gem 'jquery-fileupload-rails'
#gem 'inherited_resources', :git => "https://github.com/activeadmin/inherited_resources.git"
gem "font-awesome-rails"
# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development
group :development, :test do
# Call 'byebug' anywhere in the code to stop execution and get a debugger console
gem 'byebug', platform: :mri
end
group :development do
# Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
gem 'web-console'
end
# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
If you need more details I can paste my other file. Just ask me ;)
EDIT
Gist link Here