Error when excluding asset paths in application.rb

[benjichen16]

What were you trying to do?

Was trying to install the administrate gem and run the rails generate administrate:install command to generate some views.

What did you end up with (logs, or, even better, example apps are great!)?

Here is an example application I created:
https://github.com/benjichen16/erroring_app_for_administrate_gem

Inside this app, we have the default rails application and the administrate gem. In the second commit of this repo, I added this line:

config.assets.excluded_paths << "app/assets/application.css"

Which will cause the application to error out with these logs:

$ rails generate administrate:install
/example_app/config/application.rb:21:in `<class:Application>': undefined method `<<' for nil:NilClass (NoMethodError)

    config.assets.excluded_paths << "app/assets/stylesheets/tailwind.css"
                                 ^^
	from example_app/config/application.rb:10:in `<module:ExampleApp>'
	from example_app/config/application.rb:9:in `<main>'
	from </ruby-3.2.1/lib/ruby/3.2.0/rubygems/core_ext/kernel_require.rb>:37:in `require'
	from </ruby-3.2.1/lib/ruby/3.2.0/rubygems/core_ext/kernel_require.rb>:37:in `require'

I believe this is related to this issue:
#2091

What versions are you running?

• Rails: Rails 7.0.8
• administrate: 0.19.0