deviseのサインアウトでエラー

deviseを利用してログイン機能を利用してログアウトをしたところ、「Couldn't find User with 'id'=sign_out」というエラーが表示されました。

devise_for :userをroutesの先頭に記述したり、application.jsファイルを確認したりもしましたが、解決できませんでした。
以下エラー文と各コードになります。

ActiveRecord::RecordNotFound in UsersController#show
Couldn't find User with 'id'=sign_out
Extracted source (around line #8):

7  def show
8    @user = User.find(params[:id]) ←エラー表示部分
9  end
10 
11 def edit

application.js

// This is a manifest file that'll be compiled into application.js, which will include all the files
// listed below.
//
// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
// or any plugin's vendor/assets/javascripts directory can be referenced here using a relative path.
//
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// compiled file. JavaScript code in this file should be added after the last require_* statement.
//
// Read Sprockets README (https://github.com/rails/sprockets#sprockets-directives) for details
// about supported directives.
//
//= require jquery
//= require jquery_ujs
//= require turbolinks
//= require bootstrap-sprockets
//= require_tree .

routes.rb

Rails.application.routes.draw do
  devise_for :users
  
  get root 'top#top'
  
  get '/home/about', to: 'top#home'
  
  resources :users
  
  resources :books
  
  
  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
end

users_controller.rb

class UsersController < ApplicationController
  def index
    @user = current_user
    @users = User.all
  end
  
  def new
    @user = User.new
  end

  def create
    user = User.new(user_params)
    user.save
    redirect_to '/books/:id'
  end
  
  def show
    @user = User.find(params[:id])
  end

  def edit
    @user = User.find(params[:id])
  end
  
  private
   
  def user_params
    params.require(:user).permit(:title, :opinion, :profile_image)
  end
end

user.rb

class User < ApplicationRecord
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable, :trackable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable

  attachment :profile_image
end

_header.html.erb

<header class="navbar navbar-inverse navbar-fixed-top">
  <div class="container header-container">
	<div class="navbar-left">
	  <h1>Bookers</h1>
	</div>
	  <ul class="nav navbar-nav navbar-right">
      <% if user_signed_in? %>
        <li>
        	<%= link_to user_path(current_user) do %>
            <i class="fa fa-home">Home</i>
          <% end %>
        </li>
	  	  <li>
	  	  	<%= link_to users_path do %>
            <i class="fa fa-user">Users</i>
          <% end %>
        </li>
	  	  <li>
	  	  	<%= link_to books_path do %>
            <i class="fa fa-book">Books</i>
          <% end %>
	  	  </li>
	  	  <li>
	  	  	<%= link_to destroy_user_session_path, method: :delete do %>
            <i class="fa fa-log-out">logout</i>
          <% end %>
        </li>
      <% else %>
        <li>
        	<%= link_to root_path do %>
            <i class="fa fa-home">Home</i>
          <% end %>
        </li>
	  	  <li>
	  	  	<%= link_to home_about_path do %>
            <i class="fa fa-link">About</i>
          <% end %>
	  	  </li>
	  	  <li>
	  	  	<%= link_to new_user_registration_path do %>
            <i class="fa fa-edit">sign_up</i>
          <% end %>
	  	  </li>
	  	  <li>
	  	  	<%= link_to new_user_session_path do %>
            <i class="fa fa-log-in">login</i>
          <% end %>
	  	  </li>
	  	<% end %>
    </ul>
  </div>
</header>

show.html.erb

<%= render 'shared/header' %>

<div class="top">

<div class="container">
  <div class="row">
    <div class="col-lg-3">
    <p>User info</p>
      <%= attachment_image_tag @user, :profile_image, :fill, 30, 30, format: 'jpeg', fallback: "no_image.jpg" %>
        <table class="table">
          <tr>
　　        <th>name</th>
　　        <th><%= @user.name %></th>
　        </tr>
　        <tr>
　　        <th>introduction</th>
　　        <th><%= @user.introduction %></th>
　　      </tr>
        </table>
      <%= link_to  edit_user_path, class: "btn btn-default" do %>
        <i class="fa fa-wrench"></i>
      <% end %>
      <p>New book</p>
      <%= form_for(@user, url: '/users') do |f| %>
        <p>Title</p>
        <%= f.text_field :title %>
        <p>Opinion</p>
        <%= f.text_area :opinion %>
        <%= f.submit 'Create Book' %>
      <% end %>
    </div>
        
    <div class="col-lg-9">
      <p>Books</p>
      <table class="table table-hover">
        <thead>
          <tr>
            <th></th>
            <th>Title</th>
            <th>Opinion</th>
          </tr>
        </thead>
        <tbody>
          <% if @users.present? %>
            <% @users.each do |user| %>
            <tr>
              <td></td>
              <td><%= user.title %></td>
              <td><%= user.opinion %></td>
            </tr>
            <% end %>
          <% end %>
        </tbody>
      </table>
    </div>
    
  </div>
</div>

</div>

<%= render 'shared/footer' %>

お気づきの点がありましたら、ご指摘ください。
よろしくお願いします。