我正在学习 Rails 课程，并收到以下错误，告诉我安装 tzinfo-data gem。但是，gem 已安装。它在我的 gemfile 中。我可以在 Ruby 目录中找到该文件夹。为什么这仍然告诉我安装 tzinfo-data？
命令行响应和 gemfile 如下：
C:\Users\KevinLamb\Documents\sites\demo_project>rails db:schema:dump
rails aborted!
TZInfo::DataSourceNotFound: tzinfo-data is not present. Please add gem 'tzinfo-data' to your Gemfile and run bundle install
C:/Users/KevinLamb/Documents/sites/demo_project/config/environment.rb:5:in `<main>'
Caused by:
TZInfo::DataSources::ZoneinfoDirectoryNotFound: None of the paths included in TZInfo::DataSources::ZoneinfoDataSource.search_path are valid zoneinfo directories.
C:/Users/KevinLamb/Documents/sites/demo_project/config/environment.rb:5:in `<main>'
Tasks: TOP => db:schema:dump => db:load_config => environment
(See full trace by running task with --trace)
我正在工作的 demo_project 目录中的 Gemfile：
source "https://rubygems.org"
git_source(:github) { |repo| "https://github.com/#{repo}.git" }
ruby …