Getting error on Rails Application

class TodoList < ActiveRecord::Base
  validates :title,presence: true, length: {minimum: 3}
  validates :description, presence: true, length: {minimum: 5}
end

class TodoListsController < ApplicationController
  before_action :set_todo_list, only: [:show, :edit, :update, :destroy]

  # GET /todo_lists
  # GET /todo_lists.json
  def index
    @todo_lists = TodoList.all
  end

  # GET /todo_lists/1
  # GET /todo_lists/1.json
  def show
  end

  # GET /todo_lists/new
  def new
    @todo_list = TodoList.new
  end

  # GET /todo_lists/1/edit
  def edit
  end

  # POST /todo_lists
  # POST /todo_lists.json
  def create
    @todo_list = TodoList.new(todo_list_params)

    respond_to do |format|
      if @todo_list.save
        format.html { redirect_to @todo_list, notice: 'Todo list was successfully created.' }
        format.json { render :show, status: :created, location: @todo_list }
      else
        format.html { render :new }
        format.json { render json: @todo_list.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /todo_lists/1
  # PATCH/PUT /todo_lists/1.json
  def update
    respond_to do |format|
      if @todo_list.update(todo_list_params)
        format.html { redirect_to @todo_list, notice: 'Todo list was successfully updated.' }
        format.json { render :show, status: :ok, location: @todo_list }
      else
        format.html { render :edit }
        format.json { render json: @todo_list.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /todo_lists/1
  # DELETE /todo_lists/1.json
  def destroy
    @todo_list.destroy
    respond_to do |format|
      format.html { redirect_to todo_lists_url, notice: 'Todo list was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_todo_list
      @todo_list = TodoList.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def todo_list_params
      params.require(:todo_list).permit(:title, :description)
    end
end

<p id="notice"><%= notice %></p>

<h1>Listing Todo Lists</h1>

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

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

<br>

<%= link_to 'New Todo list', new_todo_list_path %>