Railsのルーティングエラー【uninitialized constant ApplicationRecord】

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前提・実現したいこと

Rails5でルーティングエラーを修正したい

発生している問題・エラーメッセージ

ルーティングエラー

uninitialized constant ApplicationRecord

該当のソースコード

エラーメッセージ

Routing Error
uninitialized constant ApplicationRecord
Rails.root: C:/Users/R/Mysite

Application Trace | Framework Trace | Full Trace
app/controllers/application_controller.rb:1:in `<top (required)>'
app/controllers/home_controller.rb:1:in `<top (required)>'
Routes
Routes match in priority from top to bottom

Helper	HTTP Verb	Path	Controller#Action
Path / Url		
Path Match
POST	/home/index:id(.:format)	
home#show

index_path	GET	/index(.:format)	
home#index

users_sign_in_path	GET	/users/sign_in(.:format)	
home#sign_in

users_sign_up_path	GET	/users/sign_up(.:format)	
home#sign_up

post_path	POST	/post(.:format)	
home#post

GET	/	
home#top

rails_service_blob_path	GET	/rails/active_storage/blobs/:signed_id/*filename(.:format)	
active_storage/blobs#show

rails_blob_representation_path	GET	/rails/active_storage/representations/:signed_blob_id/:variation_key/*filename(.:format)	
active_storage/representations#show

rails_disk_service_path	GET	/rails/active_storage/disk/:encoded_key/*filename(.:format)	
active_storage/disk#show

update_rails_disk_service_path	PUT	/rails/active_storage/disk/:encoded_token(.:format)	
active_storage/disk#update

rails_direct_uploads_path	POST	/rails/active_storage/direct_uploads(.:format)	
active_storage/direct_uploads#create

Request
Parameters:

None
Toggle session dump
_csrf_token: "rF0H5ZhGpMjby34Lzc0PMxcQLBdPFeT1kjYO91hDRHM="
session_id: "e641c9508e8db64002ae2f6ab3b072af"
Toggle env dump
GATEWAY_INTERFACE: "CGI/1.2"
HTTP_ACCEPT: "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9"
HTTP_ACCEPT_ENCODING: "gzip, deflate, br"
HTTP_ACCEPT_LANGUAGE: "ja,en-US;q=0.9,en;q=0.8"
HTTP_CACHE_CONTROL: "max-age=0"
HTTP_VERSION: "HTTP/1.1"
ORIGINAL_SCRIPT_NAME: ""
REMOTE_ADDR: "::1"
SERVER_NAME: "localhost"
SERVER_PROTOCOL: "HTTP/1.1"
Response
Headers:

None

routes.rb
Rails.application.routes.draw do
  post "home/index:id" => "home#show"
  get "/index" => "home#index"
  get "users/sign_in" => "home#sign_in"
  get "users/sign_up" => "home#sign_up"
  post "/post" => "home#post"
  get "/" => "home#top"
  // For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
end


application.contoroller.rb
class ApplicationController < ApplicationRecord
  # ActionController::Base
  # before_action :authenticate_user!, only: [:post]
  def redirect
    redirect_to("/index")
  end
  def index
    @videos = Video.all
  end
  def sign_in
  end
  def sign_up
  end
  def require_login
  end
  def top
  end
  def post
  end
  def show
  end
end

index.html.erb
1<h1>投稿の一覧ページ</h1>
2<p>一覧ページです(´・ω・`)一覧ページです(´・ω・`)一覧ページです(´・ω・`)一覧ページです(´・ω・`)一覧ページです(´・ω・`)一覧ページです(´・ω・`)一覧ページです(´・ω・`)一覧ページです(´・ω・`)一覧ページです(´・ω・`)一覧ページです(´・ω・`)一覧ページです(´・ω・`)一覧ページです(´・ω・`)一覧ページです(´・ω・`)一覧ページです(´・ω・`)一覧ページです(´・ω・`)一覧ページです(´・ω・`)一覧ページです(´・ω・`)</p>
3<% @videos = Video.all %>
4<% @videos.each do |video| %>
5<%= link_to("#{video.id}ページ","/index/#{video.id}")%>
6<% end %>
7