Rspecを学習していますがエラーが内容が分からず停滞しています。

内容

Rspecでテストを書いています。以下のような内容でエラーが起きているのですが、内容がいまいちわかりません。

エラー内容

Failures:

  1) 投稿機能 一覧表示機能 ユーザーAがログインしている時 ユーザーAが作成したタスクが表示される
     Failure/Error: raise ActionController::RoutingError, "No route matches [#{env['REQUEST_METHOD']}] #{env['PATH_INFO'].inspect}"
     
     ActionController::RoutingError:
       No route matches [GET] "/assets/stylesheets/applocation.css"
     
     [Screenshot]: tmp/screenshots/failures_r_spec_example_groups_nested_nested_a_ユーザーaが作成したタスクが表示される_582.png

     
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/actionpack-5.2.4.3/lib/action_dispatch/middleware/debug_exceptions.rb:65:in `call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/actionpack-5.2.4.3/lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-5.2.4.3/lib/rails/rack/logger.rb:38:in `call_app'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-5.2.4.3/lib/rails/rack/logger.rb:26:in `block in call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-5.2.4.3/lib/active_support/tagged_logging.rb:71:in `block in tagged'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-5.2.4.3/lib/active_support/tagged_logging.rb:28:in `tagged'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-5.2.4.3/lib/active_support/tagged_logging.rb:71:in `tagged'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-5.2.4.3/lib/rails/rack/logger.rb:26:in `call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/actionpack-5.2.4.3/lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/actionpack-5.2.4.3/lib/action_dispatch/middleware/request_id.rb:27:in `call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rack-2.2.3/lib/rack/method_override.rb:24:in `call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rack-2.2.3/lib/rack/runtime.rb:22:in `call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-5.2.4.3/lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/actionpack-5.2.4.3/lib/action_dispatch/middleware/executor.rb:14:in `call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/actionpack-5.2.4.3/lib/action_dispatch/middleware/static.rb:127:in `call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rack-2.2.3/lib/rack/sendfile.rb:110:in `call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-5.2.4.3/lib/rails/engine.rb:524:in `call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rack-2.2.3/lib/rack/urlmap.rb:74:in `block in call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rack-2.2.3/lib/rack/urlmap.rb:58:in `each'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rack-2.2.3/lib/rack/urlmap.rb:58:in `call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rack-2.2.3/lib/rack/builder.rb:244:in `call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/capybara-3.33.0/lib/capybara/server/middleware.rb:58:in `call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/puma-3.12.6/lib/puma/configuration.rb:227:in `call'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/puma-3.12.6/lib/puma/server.rb:706:in `handle_request'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/puma-3.12.6/lib/puma/server.rb:476:in `process_client'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/puma-3.12.6/lib/puma/server.rb:334:in `block in run'
     # /Users/taishiito/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/puma-3.12.6/lib/puma/thread_pool.rb:135:in `block in spawn_thread'
     # 
     #   Showing full backtrace because every line was filtered out.
     #   See docs for RSpec::Configuration#backtrace_exclusion_patterns and
     #   RSpec::Configuration#backtrace_inclusion_patterns for more information.
     # ------------------
     # --- Caused by: ---
     # Capybara::ExpectationNotMet:
     #   expected "Microposts" to include "最初のタスク"
     #   ./spec/system/microposts_spec.rb:22:in `block (4 levels) in <top (required)>'

Finished in 4.98 seconds (files took 3.36 seconds to load)
1 example, 1 failure

Failed examples:

rspec ./spec/system/microposts_spec.rb:20 # 投稿機能 一覧表示機能 ユーザーAがログインしている時 ユーザーAが作成したタスクが表示される

microposts_spec.rb

require 'rails_helper'

describe '投稿機能', type: :system do
  describe '一覧表示機能' do
    before do
      #ユーザーAを作成しておく
      user_a = FactoryBot.create(:user, name:'ユーザーA', email: 'a@gmail.com')
      #作成者がユーザーAであるタスクを作成しておく
      FactoryBot.create(:micropost, title: '最初のタスク', user: user_a)
    end
    context 'ユーザーAがログインしている時' do
      before do
        #ユーザーAでログインする
        visit login_path
        fill_in 'メールアドレス', with: 'a@gmail.com'
        fill_in 'パスワード', with: 'password'
        click_button 'ログイン'
      end

      it 'ユーザーAが作成したタスクが表示される' do
        #作成済みのタスクの名称が画面上に表示されていることを確認
        expect(page).to have_title '最初のタスク'
      end
    end
  end
end

microposts#index.html.erb（ほとんどパーシャルですがイベントを投稿する内容になっています）

<body class="after_login_back">
<%= render 'microposts/searching', q: @q %>
<% @microposts.each do |micropost| %>
<%= render 'microposts/microposts', micropost: micropost %>
<% end %>
<%= link_to new_micropost_path, class: 'new_button' do%><i class="fas fa-edit"></i><%end%>

<%= paginate @microposts%>

<%= render 'layouts/return' %>
</body>