change route

app/controllers/static_pages_controller.rb

 class StaticPagesController < ApplicationController
 class StaticPagesController < ApplicationController
-  def home
+  def index
   end
   end
 end
 end

config/routes.rb

 Rails.application.routes.draw do
 Rails.application.routes.draw do
   devise_for :users
   devise_for :users
   # For details on the DSL available within this file, see https://guides.rubyonrails.org/routing.html
   # For details on the DSL available within this file, see https://guides.rubyonrails.org/routing.html
-  root "static_pages#home"
-  get "static_pages/home"
+  root "static_pages#index"
+  get "static_pages/index"
   get "/favorite", to: "static_pages#favorite"
   get "/favorite", to: "static_pages#favorite"
   get "/history",to: "static_pages#history"
   get "/history",to: "static_pages#history"
 end
 end