cannot load such file -- sass

[Marcellllll]

Hi,

I am trying to move from sass-rails to sassc-rails due to sass-rails becoming obsolete and due to big compilation delays (having rack-time-outs when reloading after changing a sass file),.

When I start my development server after replacing sass-rails with sassc-rails I get the following error:

cannot load such file -- sass (in the line of the stylesheet_link_tag in the html)

When using sassc-rails and I enter SassC in the irb console I get a NameError (uninitialized constant) (not sure whether this is useful information).

I am running out of ideas to test of what it might be...

Anybody has any idea what this might be due to ?

Thanks and kind regards,

Marcel

[rlue]

I can confirm that this is happening on an existing, large Rails application I work on (Ruby 2.4.4 / Rails 5.1.5).

It is not happening on a brand new Rails application with roughly the same versions (Ruby 2.4.4 / Rails 5.1.6), nor on current versions (Ruby 2.5.0 / Rails 5.2).

Below are the contents of the Rails error page:

LoadError in InitController#index

cannot load such file -- sass

Extracted source (around line #8):

6  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
7  <title><%= Setting.get('product_name') %></title>
8  <%= stylesheet_link_tag "application", :media => 'all' %>
9  <%= stylesheet_link_tag "application-print", :media => 'print' %>
10 <% if Rails.configuration.assets.debug %>
11 <%= javascript_include_tag "application" %>

Rails.root: /home/rlue/Projects/zammad

Application Trace

app/views/layouts/application.html.erb:8:in `_app_views_layouts_application_html_erb___404047963644414565_47061518111360'

Framework (Full) Trace

activesupport (5.1.5) lib/active_support/dependencies.rb:292:in `require'
activesupport (5.1.5) lib/active_support/dependencies.rb:292:in `block in require'
activesupport (5.1.5) lib/active_support/dependencies.rb:258:in `load_dependency'
activesupport (5.1.5) lib/active_support/dependencies.rb:292:in `require'
sprockets (3.7.2) lib/sprockets/autoload/sass.rb:1:in `<top (required)>'
activesupport (5.1.5) lib/active_support/dependencies.rb:292:in `require'
activesupport (5.1.5) lib/active_support/dependencies.rb:292:in `block in require'
activesupport (5.1.5) lib/active_support/dependencies.rb:258:in `load_dependency'
activesupport (5.1.5) lib/active_support/dependencies.rb:292:in `require'
sprockets (3.7.2) lib/sprockets/sass_processor.rb:47:in `initialize'
sprockets (3.7.2) lib/sprockets/sass_processor.rb:26:in `new'
sprockets (3.7.2) lib/sprockets/sass_processor.rb:26:in `instance'
sprockets (3.7.2) lib/sprockets/sass_processor.rb:34:in `cache_key'
sprockets (3.7.2) lib/sprockets/processor_utils.rb:93:in `processor_cache_key'
sprockets (3.7.2) lib/sprockets/cached_environment.rb:22:in `block in initialize'
sprockets (3.7.2) lib/sprockets/cached_environment.rb:53:in `processor_cache_key'
sprockets (3.7.2) lib/sprockets/processor_utils.rb:102:in `block in processors_cache_keys'
sprockets (3.7.2) lib/sprockets/processor_utils.rb:102:in `map'
sprockets (3.7.2) lib/sprockets/processor_utils.rb:102:in `processors_cache_keys'
sprockets (3.7.2) lib/sprockets/processing.rb:159:in `resolve_processors_cache_key_uri'
sprockets (3.7.2) lib/sprockets.rb:162:in `block in <module:Sprockets>'
sprockets (3.7.2) lib/sprockets/dependencies.rb:67:in `resolve_dependency'
sprockets (3.7.2) lib/sprockets/cached_environment.rb:23:in `block in initialize'
sprockets (3.7.2) lib/sprockets/cached_environment.rb:59:in `resolve_dependency'
sprockets (3.7.2) lib/sprockets/loader.rb:268:in `block in resolve_dependencies'
sprockets (3.7.2) lib/sprockets/loader.rb:268:in `map'
sprockets (3.7.2) lib/sprockets/loader.rb:268:in `resolve_dependencies'
sprockets (3.7.2) lib/sprockets/loader.rb:55:in `block in load'
sprockets (3.7.2) lib/sprockets/loader.rb:311:in `block in fetch_asset_from_dependency_cache'
sprockets (3.7.2) lib/sprockets/loader.rb:307:in `each'
sprockets (3.7.2) lib/sprockets/loader.rb:307:in `each_with_index'
sprockets (3.7.2) lib/sprockets/loader.rb:307:in `fetch_asset_from_dependency_cache'
sprockets (3.7.2) lib/sprockets/loader.rb:44:in `load'
sprockets (3.7.2) lib/sprockets/cached_environment.rb:20:in `block in initialize'
sprockets (3.7.2) lib/sprockets/cached_environment.rb:47:in `load'
sprockets (3.7.2) lib/sprockets/base.rb:66:in `find_asset'
sprockets (3.7.2) lib/sprockets/base.rb:92:in `[]'
sprockets-rails (3.2.1) lib/sprockets/rails/helper.rb:355:in `find_asset'
sprockets-rails (3.2.1) lib/sprockets/rails/helper.rb:329:in `asset_path'
sprockets-rails (3.2.1) lib/sprockets/rails/helper.rb:102:in `block in resolve_asset_path'
sprockets-rails (3.2.1) lib/sprockets/rails/helper.rb:242:in `block in resolve_asset'
sprockets-rails (3.2.1) lib/sprockets/rails/helper.rb:241:in `each'
sprockets-rails (3.2.1) lib/sprockets/rails/helper.rb:241:in `detect'
sprockets-rails (3.2.1) lib/sprockets/rails/helper.rb:241:in `resolve_asset'
sprockets-rails (3.2.1) lib/sprockets/rails/helper.rb:101:in `resolve_asset_path'
sprockets-rails (3.2.1) lib/sprockets/rails/helper.rb:79:in `compute_asset_path'
actionview (5.1.5) lib/action_view/helpers/asset_url_helper.rb:198:in `asset_path'
actionview (5.1.5) lib/action_view/helpers/asset_url_helper.rb:343:in `stylesheet_path'
actionview (5.1.5) lib/action_view/helpers/asset_tag_helper.rb:118:in `block in stylesheet_link_tag'
actionview (5.1.5) lib/action_view/helpers/asset_tag_helper.rb:114:in `map'
actionview (5.1.5) lib/action_view/helpers/asset_tag_helper.rb:114:in `stylesheet_link_tag'
sprockets-rails (3.2.1) lib/sprockets/rails/helper.rb:185:in `block in stylesheet_link_tag'
sprockets-rails (3.2.1) lib/sprockets/rails/helper.rb:183:in `map'
sprockets-rails (3.2.1) lib/sprockets/rails/helper.rb:183:in `stylesheet_link_tag'
actionview (5.1.5) lib/action_view/template.rb:157:in `block in render'
activesupport (5.1.5) lib/active_support/notifications.rb:168:in `instrument'
actionview (5.1.5) lib/action_view/template.rb:352:in `instrument_render_template'
actionview (5.1.5) lib/action_view/template.rb:155:in `render'
actionview (5.1.5) lib/action_view/renderer/template_renderer.rb:64:in `render_with_layout'
actionview (5.1.5) lib/action_view/renderer/template_renderer.rb:50:in `render_template'
actionview (5.1.5) lib/action_view/renderer/template_renderer.rb:14:in `render'
actionview (5.1.5) lib/action_view/renderer/renderer.rb:42:in `render_template'
actionview (5.1.5) lib/action_view/renderer/renderer.rb:23:in `render'
actionview (5.1.5) lib/action_view/rendering.rb:103:in `_render_template'
actionpack (5.1.5) lib/action_controller/metal/streaming.rb:217:in `_render_template'
actionview (5.1.5) lib/action_view/rendering.rb:83:in `render_to_body'
actionpack (5.1.5) lib/action_controller/metal/rendering.rb:52:in `render_to_body'
actionpack (5.1.5) lib/action_controller/metal/renderers.rb:141:in `render_to_body'
actionpack (5.1.5) lib/abstract_controller/rendering.rb:24:in `render'
actionpack (5.1.5) lib/action_controller/metal/rendering.rb:36:in `render'
actionpack (5.1.5) lib/action_controller/metal/instrumentation.rb:44:in `block (2 levels) in render'
activesupport (5.1.5) lib/active_support/core_ext/benchmark.rb:12:in `block in ms'
/home/rlue/.rbenv/versions/2.4.4/lib/ruby/2.4.0/benchmark.rb:308:in `realtime'
activesupport (5.1.5) lib/active_support/core_ext/benchmark.rb:12:in `ms'
actionpack (5.1.5) lib/action_controller/metal/instrumentation.rb:44:in `block in render'
actionpack (5.1.5) lib/action_controller/metal/instrumentation.rb:87:in `cleanup_view_runtime'
activerecord (5.1.5) lib/active_record/railties/controller_runtime.rb:29:in `cleanup_view_runtime'
actionpack (5.1.5) lib/action_controller/metal/instrumentation.rb:43:in `render'
actionpack (5.1.5) lib/action_controller/metal/implicit_render.rb:33:in `default_render'
actionpack (5.1.5) lib/action_controller/metal/basic_implicit_render.rb:4:in `block in send_action'
actionpack (5.1.5) lib/action_controller/metal/basic_implicit_render.rb:4:in `tap'
actionpack (5.1.5) lib/action_controller/metal/basic_implicit_render.rb:4:in `send_action'
actionpack (5.1.5) lib/abstract_controller/base.rb:186:in `process_action'
actionpack (5.1.5) lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack (5.1.5) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
activesupport (5.1.5) lib/active_support/callbacks.rb:131:in `run_callbacks'
actionpack (5.1.5) lib/abstract_controller/callbacks.rb:19:in `process_action'
actionpack (5.1.5) lib/action_controller/metal/rescue.rb:20:in `process_action'
actionpack (5.1.5) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
activesupport (5.1.5) lib/active_support/notifications.rb:166:in `block in instrument'
activesupport (5.1.5) lib/active_support/notifications/instrumenter.rb:21:in `instrument'
activesupport (5.1.5) lib/active_support/notifications.rb:166:in `instrument'
actionpack (5.1.5) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
actionpack (5.1.5) lib/action_controller/metal/params_wrapper.rb:252:in `process_action'
activerecord (5.1.5) lib/active_record/railties/controller_runtime.rb:22:in `process_action'
actionpack (5.1.5) lib/abstract_controller/base.rb:124:in `process'
actionview (5.1.5) lib/action_view/rendering.rb:30:in `process'
actionpack (5.1.5) lib/action_controller/metal.rb:189:in `dispatch'
actionpack (5.1.5) lib/action_controller/metal.rb:253:in `dispatch'
actionpack (5.1.5) lib/action_dispatch/routing/route_set.rb:49:in `dispatch'
actionpack (5.1.5) lib/action_dispatch/routing/route_set.rb:31:in `serve'
actionpack (5.1.5) lib/action_dispatch/journey/router.rb:50:in `block in serve'
actionpack (5.1.5) lib/action_dispatch/journey/router.rb:33:in `each'
actionpack (5.1.5) lib/action_dispatch/journey/router.rb:33:in `serve'
actionpack (5.1.5) lib/action_dispatch/routing/route_set.rb:844:in `call'
omniauth (1.7.1) lib/omniauth/strategy.rb:190:in `call!'
omniauth (1.7.1) lib/omniauth/strategy.rb:168:in `call'
omniauth (1.7.1) lib/omniauth/strategy.rb:190:in `call!'
omniauth (1.7.1) lib/omniauth/strategy.rb:168:in `call'
omniauth (1.7.1) lib/omniauth/strategy.rb:190:in `call!'
omniauth (1.7.1) lib/omniauth/strategy.rb:168:in `call'
omniauth (1.7.1) lib/omniauth/strategy.rb:190:in `call!'
omniauth (1.7.1) lib/omniauth/strategy.rb:168:in `call'
omniauth (1.7.1) lib/omniauth/strategy.rb:190:in `call!'
omniauth (1.7.1) lib/omniauth/strategy.rb:168:in `call'
omniauth (1.7.1) lib/omniauth/strategy.rb:190:in `call!'
omniauth (1.7.1) lib/omniauth/strategy.rb:168:in `call'
omniauth (1.7.1) lib/omniauth/strategy.rb:190:in `call!'
omniauth (1.7.1) lib/omniauth/strategy.rb:168:in `call'
omniauth (1.7.1) lib/omniauth/strategy.rb:190:in `call!'
omniauth (1.7.1) lib/omniauth/strategy.rb:168:in `call'
omniauth (1.7.1) lib/omniauth/strategy.rb:190:in `call!'
omniauth (1.7.1) lib/omniauth/strategy.rb:168:in `call'
omniauth (1.7.1) lib/omniauth/builder.rb:63:in `call'
bullet (5.9.0) lib/bullet/rack.rb:12:in `call'
rack (2.0.6) lib/rack/etag.rb:25:in `call'
rack (2.0.6) lib/rack/conditional_get.rb:25:in `call'
rack (2.0.6) lib/rack/head.rb:12:in `call'
rack (2.0.6) lib/rack/session/abstract/id.rb:232:in `context'
rack (2.0.6) lib/rack/session/abstract/id.rb:226:in `call'
actionpack (5.1.5) lib/action_dispatch/middleware/cookies.rb:613:in `call'
activerecord (5.1.5) lib/active_record/migration.rb:556:in `call'
actionpack (5.1.5) lib/action_dispatch/middleware/callbacks.rb:26:in `block in call'
activesupport (5.1.5) lib/active_support/callbacks.rb:97:in `run_callbacks'
actionpack (5.1.5) lib/action_dispatch/middleware/callbacks.rb:24:in `call'
actionpack (5.1.5) lib/action_dispatch/middleware/executor.rb:12:in `call'
actionpack (5.1.5) lib/action_dispatch/middleware/debug_exceptions.rb:59:in `call'
actionpack (5.1.5) lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'
railties (5.1.5) lib/rails/rack/logger.rb:36:in `call_app'
railties (5.1.5) lib/rails/rack/logger.rb:24:in `block in call'
activesupport (5.1.5) lib/active_support/tagged_logging.rb:69:in `block in tagged'
activesupport (5.1.5) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (5.1.5) lib/active_support/tagged_logging.rb:69:in `tagged'
railties (5.1.5) lib/rails/rack/logger.rb:24:in `call'
actionpack (5.1.5) lib/action_dispatch/middleware/remote_ip.rb:79:in `call'
actionpack (5.1.5) lib/action_dispatch/middleware/request_id.rb:25:in `call'
rack (2.0.6) lib/rack/method_override.rb:22:in `call'
rack (2.0.6) lib/rack/runtime.rb:22:in `call'
activesupport (5.1.5) lib/active_support/cache/strategy/local_cache_middleware.rb:27:in `call'
actionpack (5.1.5) lib/action_dispatch/middleware/executor.rb:12:in `call'
actionpack (5.1.5) lib/action_dispatch/middleware/static.rb:125:in `call'
rack (2.0.6) lib/rack/sendfile.rb:111:in `call'
railties (5.1.5) lib/rails/engine.rb:522:in `call'
puma (3.11.0) lib/puma/configuration.rb:225:in `call'
puma (3.11.0) lib/puma/server.rb:624:in `handle_request'
puma (3.11.0) lib/puma/server.rb:438:in `process_client'
puma (3.11.0) lib/puma/server.rb:302:in `block in run'
puma (3.11.0) lib/puma/thread_pool.rb:120:in `block in spawn_thread'
logging (2.2.2) lib/logging/diagnostic_context.rb:474:in `block in create_with_logging_context'

This error occurred while loading the following files:
   sprockets/autoload/sass
   sass

Request

Parameters: None

Session Dump

ping: "2018-11-22T10:10:35Z"
user_agent: "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0"

Env Dump

GATEWAY_INTERFACE: "CGI/1.2"
HTTP_ACCEPT: "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"
HTTP_ACCEPT_ENCODING: "gzip, deflate"
HTTP_ACCEPT_LANGUAGE: "en-US,zh-TW;q=0.7,en;q=0.3"
HTTP_VERSION: "HTTP/1.1"
ORIGINAL_SCRIPT_NAME: ""
REMOTE_ADDR: "::1"
SERVER_NAME: "localhost"
SERVER_PROTOCOL: "HTTP/1.1"

Response

Headers: None

[Marcellllll]

Our application is reasonably big, and is using Ruby 2.5.3p105, and Rails 5.2.1 (progressively migrated from Rails 3.2).

The error is happening in the same place: the stylesheet_link_tag in the html.

Could it be some kind of setting from an earlier Rails version that gets migrated, and should be removed in order for sassc to work ?

[thorsteneckel]

JFI: You can put the gem 'sassc-rails' line before the gem 'rails' line in your Gemfile as a workaround. This works for the rails app @rlue mentioned in his comment. We need to dig deeper what's causing this exactly.

[Marcellllll]

Thank you !!

This worked, and the assets are compiled a lot quicker now 👍

[thorsteneckel]

Nice! You're welcome. I'd love to see that it works in a way that the gem 'rails' line is first. Would you mind re-opening the issue until we resolve it or should I create a new one?

[rlue]

I just tried this myself, and it turned out what mattered wasn't putting it before gem 'rails', but removing it from the group :assets block.

FWIW, this SO answer explains why the group :assets block was removed in Rails 4.

[Marcellllll]

Hi Ryan,

That's it !

I also had an assets group in the Gemfile due to coming from an older version of Rails. I moved the sassc-rails gem back to its previous location and removed the assets group, and everything is still working :-).

Thorsten, I opened and closed the issue again. Please tell me if you think there is a need to re-open it.

[amitsaxena]

Strangely this still is a problem for me in a new rails 6.0.0 app and moving gem 'sassc-rails' above gem 'rails', '~> 6.0.0' doesn't seem to help. I was attempting to migrate a fairly new app from sass-rails (5.1.0) to sassc-rails (2.1.2) and started seeing this exception.

I also don't seem to have an assets block in my Gemfile. This is what the Gemfile looks like:

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.6.4'

# Use SCSS for stylesheets
gem 'sassc-rails'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 6.0.0'
# Use postgresql as the database for Active Record
gem 'pg', '>= 0.18', '< 2.0'
# Use Puma as the app server
gem 'puma', '~> 4.2'
# Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
gem 'webpacker', '~> 4.0'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.7'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use Active Model has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Active Storage variant
# gem 'image_processing', '~> 1.2'

# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.4.2', require: false

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end

group :development do
  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
  gem 'listen', '>= 3.0.5', '< 3.3'
  gem 'web-console', '>= 3.3.0'
end

group :test do
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '>= 2.15'
  gem 'minitest-ci'
  gem 'selenium-webdriver'
  # Easy installation and use of web drivers to run system tests with browsers
  gem 'webdrivers'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

gem 'devise'
gem 'dotenv-rails', groups: [:development, :test]

This is the exception stacktrace:

LoadError (cannot load such file -- sass):
  
bootsnap (1.4.5) lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require'
bootsnap (1.4.5) lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi'
bootsnap (1.4.5) lib/bootsnap/load_path_cache/loaded_features_index.rb:89:in `register'
bootsnap (1.4.5) lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi'
bootsnap (1.4.5) lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:40:in `rescue in require'
bootsnap (1.4.5) lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:26:in `require'
zeitwerk (2.2.0) lib/zeitwerk/kernel.rb:23:in `require'
sprockets (3.7.2) lib/sprockets/autoload/sass.rb:1:in `<main>'
bootsnap (1.4.5) lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require'
bootsnap (1.4.5) lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi'
bootsnap (1.4.5) lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
bootsnap (1.4.5) lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi'
bootsnap (1.4.5) lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
zeitwerk (2.2.0) lib/zeitwerk/kernel.rb:23:in `require'
sprockets (3.7.2) lib/sprockets/sass_processor.rb:47:in `initialize'
sprockets (3.7.2) lib/sprockets/sass_processor.rb:26:in `new'
sprockets (3.7.2) lib/sprockets/sass_processor.rb:26:in `instance'
sprockets (3.7.2) lib/sprockets/sass_processor.rb:34:in `cache_key'
sprockets (3.7.2) lib/sprockets/processor_utils.rb:93:in `processor_cache_key'
sprockets (3.7.2) lib/sprockets/cached_environment.rb:22:in `block in initialize'
sprockets (3.7.2) lib/sprockets/cached_environment.rb:53:in `processor_cache_key'
sprockets (3.7.2) lib/sprockets/processor_utils.rb:102:in `block in processors_cache_keys'
sprockets (3.7.2) lib/sprockets/processor_utils.rb:102:in `map'
sprockets (3.7.2) lib/sprockets/processor_utils.rb:102:in `processors_cache_keys'
sprockets (3.7.2) lib/sprockets/processing.rb:159:in `resolve_processors_cache_key_uri'
sprockets (3.7.2) lib/sprockets.rb:162:in `block in <module:Sprockets>'
sprockets (3.7.2) lib/sprockets/dependencies.rb:67:in `resolve_dependency'
sprockets (3.7.2) lib/sprockets/cached_environment.rb:23:in `block in initialize'
sprockets (3.7.2) lib/sprockets/cached_environment.rb:59:in `resolve_dependency'
sprockets (3.7.2) lib/sprockets/loader.rb:268:in `block in resolve_dependencies'
sprockets (3.7.2) lib/sprockets/loader.rb:268:in `map'
sprockets (3.7.2) lib/sprockets/loader.rb:268:in `resolve_dependencies'
sprockets (3.7.2) lib/sprockets/loader.rb:55:in `block in load'
sprockets (3.7.2) lib/sprockets/loader.rb:311:in `block in fetch_asset_from_dependency_cache'
sprockets (3.7.2) lib/sprockets/loader.rb:307:in `each'
sprockets (3.7.2) lib/sprockets/loader.rb:307:in `each_with_index'
sprockets (3.7.2) lib/sprockets/loader.rb:307:in `fetch_asset_from_dependency_cache'
sprockets (3.7.2) lib/sprockets/loader.rb:44:in `load'
sprockets (3.7.2) lib/sprockets/cached_environment.rb:20:in `block in initialize'
sprockets (3.7.2) lib/sprockets/cached_environment.rb:47:in `load'
sprockets (3.7.2) lib/sprockets/base.rb:66:in `find_asset'
sprockets (3.7.2) lib/sprockets/environment.rb:30:in `find_asset'
sprockets (3.7.2) lib/sprockets/server.rb:49:in `call'
actionpack (6.0.0) lib/action_dispatch/routing/mapper.rb:19:in `block in <class:Constraints>'
actionpack (6.0.0) lib/action_dispatch/routing/mapper.rb:48:in `serve'
actionpack (6.0.0) lib/action_dispatch/journey/router.rb:49:in `block in serve'
actionpack (6.0.0) lib/action_dispatch/journey/router.rb:32:in `each'
actionpack (6.0.0) lib/action_dispatch/journey/router.rb:32:in `serve'
actionpack (6.0.0) lib/action_dispatch/routing/route_set.rb:837:in `call'
warden (1.2.8) lib/warden/manager.rb:36:in `block in call'
warden (1.2.8) lib/warden/manager.rb:34:in `catch'
warden (1.2.8) lib/warden/manager.rb:34:in `call'
rack (2.0.7) lib/rack/tempfile_reaper.rb:15:in `call'
rack (2.0.7) lib/rack/etag.rb:25:in `call'
rack (2.0.7) lib/rack/conditional_get.rb:25:in `call'
rack (2.0.7) lib/rack/head.rb:12:in `call'
actionpack (6.0.0) lib/action_dispatch/http/content_security_policy.rb:18:in `call'
rack (2.0.7) lib/rack/session/abstract/id.rb:232:in `context'
rack (2.0.7) lib/rack/session/abstract/id.rb:226:in `call'
actionpack (6.0.0) lib/action_dispatch/middleware/cookies.rb:648:in `call'
activerecord (6.0.0) lib/active_record/migration.rb:567:in `call'
actionpack (6.0.0) lib/action_dispatch/middleware/callbacks.rb:27:in `block in call'
activesupport (6.0.0) lib/active_support/callbacks.rb:101:in `run_callbacks'
actionpack (6.0.0) lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack (6.0.0) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (6.0.0) lib/action_dispatch/middleware/actionable_exceptions.rb:17:in `call'
actionpack (6.0.0) lib/action_dispatch/middleware/debug_exceptions.rb:32:in `call'
web-console (4.0.1) lib/web_console/middleware.rb:132:in `call_app'
web-console (4.0.1) lib/web_console/middleware.rb:28:in `block in call'
web-console (4.0.1) lib/web_console/middleware.rb:17:in `catch'
web-console (4.0.1) lib/web_console/middleware.rb:17:in `call'
actionpack (6.0.0) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
railties (6.0.0) lib/rails/rack/logger.rb:38:in `call_app'
railties (6.0.0) lib/rails/rack/logger.rb:26:in `block in call'
activesupport (6.0.0) lib/active_support/tagged_logging.rb:80:in `block in tagged'
activesupport (6.0.0) lib/active_support/tagged_logging.rb:28:in `tagged'
activesupport (6.0.0) lib/active_support/tagged_logging.rb:80:in `tagged'
railties (6.0.0) lib/rails/rack/logger.rb:26:in `call'
sprockets-rails (3.2.1) lib/sprockets/rails/quiet_assets.rb:11:in `block in call'
activesupport (6.0.0) lib/active_support/logger_silence.rb:36:in `silence'
activesupport (6.0.0) lib/active_support/logger.rb:64:in `block (3 levels) in broadcast'
activesupport (6.0.0) lib/active_support/logger_silence.rb:36:in `silence'
activesupport (6.0.0) lib/active_support/logger.rb:62:in `block (2 levels) in broadcast'
sprockets-rails (3.2.1) lib/sprockets/rails/quiet_assets.rb:11:in `call'
actionpack (6.0.0) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack (6.0.0) lib/action_dispatch/middleware/request_id.rb:27:in `call'
rack (2.0.7) lib/rack/method_override.rb:22:in `call'
rack (2.0.7) lib/rack/runtime.rb:22:in `call'
activesupport (6.0.0) lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'
actionpack (6.0.0) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (6.0.0) lib/action_dispatch/middleware/static.rb:126:in `call'
rack (2.0.7) lib/rack/sendfile.rb:111:in `call'
actionpack (6.0.0) lib/action_dispatch/middleware/host_authorization.rb:83:in `call'
webpacker (4.0.7) lib/webpacker/dev_server_proxy.rb:29:in `perform_request'
rack-proxy (0.6.5) lib/rack/proxy.rb:57:in `call'
railties (6.0.0) lib/rails/engine.rb:526:in `call'
puma (4.2.1) lib/puma/configuration.rb:228:in `call'
puma (4.2.1) lib/puma/server.rb:667:in `handle_request'
puma (4.2.1) lib/puma/server.rb:470:in `process_client'
puma (4.2.1) lib/puma/server.rb:328:in `block in run'
puma (4.2.1) lib/puma/thread_pool.rb:134:in `block in spawn_thread'

[Harrisonkamau]

@amitsaxena Have you tried running bundle update --conservative?. It helps to ensure you don't have sass-rails in your Gemfile

Then run: bundle exec rake -P to make sure everything is okay