No route matches {:action=>“show”...} missing required keys: [:id] when accessing New Action?

Why is happening this when I'm trying to access the action new?

routes.rb

resources :tvseries

tvseries_controller.rb

class TvseriesController < ApplicationController
  before_action :set_tvseries, only: [:show, :edit, :update, :destroy]

  # GET /tvseries
  # GET /tvseries.json
  def index
    @tvseries = Tvserie.all
  end

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

  # GET /tvseries/new
  def new
    @tvseries = Tvserie.new
  end

  # GET /tvseries/1/edit
  def edit
  end

  # POST /tvseries
  # POST /tvseries.json
  def create
    @tvseries = Tvserie.new(tvseries_params)

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

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

  # DELETE /tvseries/1
  # DELETE /tvseries/1.json
  def destroy
    @tvseries.destroy
    respond_to do |format|
      format.html { redirect_to tvseries_url, notice: 'Tvserie was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  # GET /all_tv_series
  def all
    @tv_series = Tvserie.all
  end

  # GET /tv_series/add_language/1
  # GET /tv_s/add_language/1.json
  def add_subtitles
    @languages = Language.all
  end

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

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