ERROR: uninitialized constant PersonnelCoreController::Personnel

[Exequiel]

This is my controller personnel_core_ controller.rb

class PersonnelCoreController < ApplicationController
	before_action :set_personnel, only: [:show, :edit, :update, :destroy]

  def index
  	@personnel = Personnel.all
  end

  def new
  	@personnel = Personnel.new
  end

  def create

		@personnel = Personnel.new(personnel_params)

		respond_to do |format|
			if @personnel.save
				format.html { redirect_to @personnel, notice: 'Personnel Successfully Added.' }
				format.json { render action: 'new', status: :created, location: @personnel }
			else
				format.html { render action: 'new' }
				format.json { render json: @personnel.errors, status: :unprocessable_entity }
			end
		end
	end

	def show
	end

	def edit
	end

	def update
	end

	def destroy
	end

	private
	# use callbacks to share common setup or constarints between actions
	def set_personnel
		@personnel = Personnel.find(params[:id])
	end

	# Never trust parameters from the scary intewrnet, only allow the white list through.
	def personnel_params
		params.require(:personnel).permit(:lastname, :firstname, :middlename, :extensionname)
	end

end

This is the form in new.html.erb

<h1>PersonnelCore#newpersonnel</h1>
<p>Find me in app/views/personnel_core/newpersonnel.html.erb</p>
<%= form_for @personnel do |e| -%>
	<fieldset>
		Last Name: <%= e.text_field :lastname -%><br>
		First Name: <%= e.text_field :firstname -%><br>
		Middle Name: <%= e.text_field :middlename -%><br>
		Extension Name: <%= e.text_field :extensionname -%><br>
		<%= e.submit 'Save' -%>
	</fieldset>
<% end -%>

every time i run the page the error always appear in index and in personnel/new page like this images. I can't debbug the error here. .

I hope somebody here can help me, , any suggestions are appreciatted. . :) thank you...please ...