我正在使用Ubuntu 18.04，Ruby 2.6.3和Rails 6。我正在开发一个新的Rails项目，但当我启动服务器时，出现以下错误：
> rails s
=> Booting Puma
=> Rails 6.0.2.1 application starting in development
=> Run `rails server --help` for more startup options
Exiting
Traceback (most recent call last):
[...]
72: from ./bin/rails:3:in `<main>'
71: from ./bin/rails:3:in `load'
70: from /home/franck/code/BTC1M/app-test/bin/spring:15:in `<top (required)>'
69: from /home/franck/.rbenv/versions/2.6.3/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
68: from /home/franck/.rbenv/versions/2.6.3/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
67: from /home/franck/.rvm/gems/ruby-2.6.3/gems/spring-2.1.0/lib/spring/binstub.rb:11:in `<top (required)>'
66: from /home/franck/.rvm/gems/ruby-2.6.3/gems/spring-2.1.0/lib/spring/binstub.rb:11:in `load'
[...]
5: from /home/franck/.rvm/gems/ruby-2.6.3/gems/activesupport-6.0.2.1/lib/active_support/lazy_load_hooks.rb:69:in `block in execute_hook'
4: from /home/franck/.rvm/gems/ruby-2.6.3/gems/less-rails-2.6.0/lib/less/rails/railtie.rb:17:in `block in <class:Railtie>'
3: from /home/franck/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/active_support.rb:58:in `load_missing_constant'
2: from /home/franck/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/active_support.rb:79:in `rescue in load_missing_constant'
1: from /home/franck/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/active_support.rb:8:in `without_bootsnap_cache'
/home/franck/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/active_support.rb:79:in `block in load_missing_constant': uninitialized constant Sprockets::Engines (NameError)
我尝试通过以下步骤卸载并重新安装Rails和Ruby：
我尝试通过以下步骤卸载并重新安装Rails和Ruby：
rvm implode
rm -rf ~/.rvm
rm -rf ~/.rbenv
sudo apt install -y build-essential tklib zlib1g-dev libssl-dev libffi-dev libxml2 libxml2-dev libxslt1-dev libreadline-dev
sudo apt clean
git clone https://github.com/rbenv/rbenv.git ~/.rbenv
git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build
rbenv install 2.6.3
rbenv global 2.6.3
gem install rails
我还尝试了
spring stop，并更新了sprockets和sprockets-rails：gem update（我的sprockets-rails版本是3.2.1），并在Gemfile.lock中更新了sprockets-rails版本：sprockets-rails（3.2.1）。我的sprockets版本是4.0.0。我还在我的gemfile中加入了
gem'sprockets'，git：'git://github.com/rails/sprockets' + bundle install（如在这个主题中所说的那样：https://github.com/rails/sass-rails/issues/48），但它没有解决我的问题。我仍然有同样的错误。我不明白发生了什么。有任何想法吗？
顺便问一下，为什么我有一个/home/franck/.rvm文件夹（我之前删除了它），因为我没用RVM而是用RBENV？
Github存储库在这里：https://github.com/BTC1M/app-test。
spring stop命令，或检查机器上是否有任何正在运行的spring进程并将其终止。 - arieljuod