ブラウザでログアウトのところをクリックしても画面を遷移できない

Question

前提・実現したいこと

ブラウザでログアウトのところをクリックして、ログイン画面に遷移できるようにしたい。

発生している問題・エラーメッセージ

post一覧画面です。ここからログアウトしようとしました。

ログアウトしたきのサーバーログです。
一応成功はしてるみたいですが、

tarted GET "/posts" for ::1 at 2021-12-09 03:52:46 +0900
Processing by PostsController#index as HTML
  User Load (1.7ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT ?  [["id", 4], ["LIMIT", 1]]
  ↳ app/controllers/application_controller.rb:9
  Rendering posts/index.html.erb within layouts/application
  Post Load (0.5ms)  SELECT "posts".* FROM "posts"
  ↳ app/views/posts/index.html.erb:13
  Rendered posts/index.html.erb within layouts/application (11.1ms)
  Rendered shared/_header.html.erb (6.2ms)
  Rendered shared/_before_login_header.html.erb (0.6ms)
  Rendered shared/_flash_message.html.erb (1.5ms)
  Rendered shared/_footer.html.erb (0.3ms)
Completed 200 OK in 355ms (Views: 147.7ms | ActiveRecord: 7.3ms)

該当のソースコード

contorollers/posts_contoroller.rb

class PostsController < ApplicationController
  before_action :require_login, only: [:edit, :destroy]
  before_action :set_post, only: %i[show edit update destroy]

  # GET /posts
  def index
    @posts = Post.all
  end

  # GET /posts/1
  def show; end

  # GET /posts/new
  def new
    @post = Post.new
  end

  # GET /posts/1/edit
  def edit; end

  # POST /posts
  def create
    @post = Post.new(post_params)

    if @post.save
      redirect_to @post, notice: 'Post was successfully created.'
    else
      render :new
    end
  end

  # PATCH/PUT /posts/1
  def update
    if @post.update(post_params)
      redirect_to @post, notice: 'Post was successfully updated.'
    else
      render :edit
    end
  end

  # DELETE /posts/1
  def destroy
    @post.destroy
    redirect_to posts_url, notice: 'Post was successfully destroyed.'
  end

  private

  # Use callbacks to share common setup or constraints between actions.
  def set_post
    @post = Post.find(params[:id])
  end

  # Only allow a trusted parameter "white list" through.
  def post_params
    params.require(:post).permit(:title, :content)
  end
end

contorollers/user_sessions_controller.rb

class UserSessionsController < ApplicationController
  def new; end

  def create
    @user = login(params[:email], params[:password])
    if @user
    redirect_back_or_to root_path, success: 'Login successful'
    else
      flash.now[:danger] = 'I failed Login'
      render :new
    end

  def destroy
    logout
    redirect_to root_path, notice: 'logout successful'
    end
  end
end

app/contorollers/aplication_contoroller.rb

class ApplicationController < ActionController::Base
  before_action :current_user
  before_action :require_login
  protect_from_forgery with: :null_session

  private

  def current_user
    @current_user ||= User.find_by(id: session[:user_id]) if session[:user_id]
  end

  protected

  def not_authenticated
    redirect_to login_path, alert: "Please login first"
  end
end

app/contorollers/posts_contoroller.rb

class PostsController < ApplicationController
  before_action :require_login, only: [:edit, :destroy]
  before_action :set_post, only: %i[show edit update destroy]

  # GET /posts
  def index
    @posts = Post.all
  end

  # GET /posts/1
  def show; end

  # GET /posts/new
  def new
    @post = Post.new
  end

  # GET /posts/1/edit
  def edit; end

  # POST /posts
  def create
    @post = Post.new(post_params)

    if @post.save
      redirect_to @post, notice: 'Post was successfully created.'
    else
      render :new
    end
  end

  # PATCH/PUT /posts/1
  def update
    if @post.update(post_params)
      redirect_to @post, notice: 'Post was successfully updated.'
    else
      render :edit
    end
  end

  # DELETE /posts/1
  def destroy
    @post.destroy
    redirect_to posts_url, notice: 'Post was successfully destroyed.'
  end

  private

  # Use callbacks to share common setup or constraints between actions.
  def set_post
    @post = Post.find(params[:id])
  end

  # Only allow a trusted parameter "white list" through.
  def post_params
    params.require(:post).permit(:title, :content)
  end
end

posts/index.html.rb

<h1>Posts</h1>

<table>
  <thead>
    <tr>
      <th>Title</th>
      <th>Content</th>
      <th colspan="3"></th>
    </tr>
  </thead>

  <tbody>
    <% @posts.each do |post| %>
      <tr>
        <td><%= post.title %></td>
        <td><%= post.content %></td>
        <td><%= link_to 'Show', post %></td>
        <td><%= link_to 'Edit', edit_post_path(post) %></td>
        <td><%= link_to 'Destroy', post, method: :delete, data: { confirm: 'Are you sure?' } %></td>
      </tr>
    <% end %>
  </tbody>
</table>

<br>

<%= link_to 'New Post', new_post_path %>

shared/_header.html.erb

<header>
  <nav class="navbar navbar-expand-lg navigation navbar-light bg-light">

    <button class="navbar-toggler" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>

    <div class="collapse navbar-collapse" id="navbarSupportedContent">
      <ul class="navbar-nav ml-auto main-nav align-items-center">
        <li class="nav-item dropdown dropdown-slide">
          <a href="#" class="nav-link dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
            Post
          </a>

          <div class="dropdown-menu dropdown-menu-right">
            <%= link_to 'Post一覧', posts_path, class: 'dropdown-item' %>
            <%= link_to 'Post作成', new_post_path, class: 'dropdown-item' %>
          </div>
        </li>

        <li class="nav-item">
          <%= link_to 'Like一覧', '#', class: 'nav-link' %>
        </li>

        <li class="nav-item dropdown dropdown-slide">
          <a href="#" class="nav-link" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" id="header-profile">
            <%= image_tag 'sample', size: '40x40', class: 'rounded-circle mr15'%>
          </a>
          <div class="dropdown-menu dropdown-menu-right">
            <div class="dropdown-item"><%# "#{current_user.last_name} #{current_user.first_name}" %></div>
            <div class="dropdown-divider"></div>
            <%= link_to 'プロフィール', '#', class: 'dropdown-item' %>
            <%= link_to 'ログアウト', '#', class: 'dropdown-item' %>
          </div>
        </li>
      </ul>
    </div>
  </nav>
</header>

shared/_before_login_header.html.erb

<header>
  <nav class="navbar navbar-expand-lg navigation navbar-light bg-light">

    <button class="navbar-toggler" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>

    <div class="collapse navbar-collapse" id="navbarSupportedContent">
      <ul class="navbar-nav ml-auto main-nav align-items-center">
        <li class="nav-item">
          <%= link_to 'ログイン', login_path, class: 'nav-link' %>
        </li>
      </ul>
    </div>
  </nav>
</header>

shared/_flash_message.html.erb

<% flash.each do |message_type, message| %>
  <div class="alert alert-<%= message_type %>"><%= message %></div>
<% end %>

shared/_footer.html.erb

<footer id='footer' class="footer-bottom">
  <div class="container">
    <div class="row">
      <div class="col-sm-6 col-12">
        <div class="copyright">
          <p>Copyright © 2021. RUNTEQ</p>
        </div>
      </div>
    </div>
  </div>
</footer>

試したこと

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補足情報（FW/ツールのバージョンなど）

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