Issue with Spring v4.3.0 Preloading - `undefined method 'root' for Rails::Application:Class (NoMethodError)`

[aaronskiba]

When using Spring v4.3.0, I encountered the following error when starting the Rails console:

$ bin/spring stop && rails c
Spring is not running
/usr/share/rvm/gems/ruby-3.0.5@dmp/gems/railties-7.1.5.1/lib/rails/railtie.rb:228:in `method_missing': undefined method `root' for Rails::Application:Class (NoMethodError)
        from /usr/share/rvm/gems/ruby-3.0.5@dmp/gems/spring-4.3.0/lib/spring/application.rb:128:in `block in preload'
        from /usr/share/rvm/gems/ruby-3.0.5@dmp/gems/spring-4.3.0/lib/spring/application.rb:127:in `each'
        from /usr/share/rvm/gems/ruby-3.0.5@dmp/gems/spring-4.3.0/lib/spring/application.rb:127:in `preload'
        from /usr/share/rvm/gems/ruby-3.0.5@dmp/gems/spring-4.3.0/lib/spring/application.rb:176:in `serve'
        from /usr/share/rvm/gems/ruby-3.0.5@dmp/gems/spring-4.3.0/lib/spring/application.rb:158:in `block in run'
        from /usr/share/rvm/gems/ruby-3.0.5@dmp/gems/spring-4.3.0/lib/spring/application.rb:152:in `loop'
        from /usr/share/rvm/gems/ruby-3.0.5@dmp/gems/spring-4.3.0/lib/spring/application.rb:152:in `run'
        from /usr/share/rvm/gems/ruby-3.0.5@dmp/gems/spring-4.3.0/lib/spring/application/boot.rb:25:in `<top (required)>'
        from <internal:/usr/share/rvm/rubies/ruby-3.0.5/lib/ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from <internal:/usr/share/rvm/rubies/ruby-3.0.5/lib/ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from -e:1:in `<main>'

The source of the problem may lie within our own codebase. However, I've created the following issue which describes things in further detail: https://github.com/rails/spring/issues/737.