我想安装boostrap gem时遇到问题，当我从Gemfile中删除boostrap gem时，一切正常，但是我需要使用bootstrap。
我的宝石
gem 'rails'
gem 'sqlite3', '< 1.4'
gem 'puma', '~> 3.7'
gem 'jquery-rails'
gem 'coffee-rails', '~> 4.2'
gem 'turbolinks', '~> 5'
gem 'jbuilder', '~> 2.5'
gem 'bootstrap', '~> 4.5', '>= 4.5.2'
gem 'bootstrap-sass', '~> 3.4', '>= 3.4.1'
当我更新捆绑包时，我得到了
Gem files will remain installed in
C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/sassc-2.4.0 for inspection.
Results logged to
C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/extensions/x86-mingw32/2.3.0/sassc-2.4.0/gem_make.out
An error occurred while installing sassc (2.4.0), and Bundler cannot continue.
Make sure that `gem install sassc -v '2.4.0' --source 'https://rubygems.org/'`
succeeds before bundling.
In Gemfile:
bootstrap was resolved to 4.5.2, which depends on
sassc-rails was resolved to 2.1.2, which depends on
sassc
红宝石2.3.3p222 Rails 5.2.4.4