Error using paperclip gem in ruby on rails - ruby-on-rails

Question

I wanted to upload image (using paperclip gem) to my product in my rails project, so i watched a youtube video how to do it (https://www.youtube.com/watch?v=Z5W-Y3aROVE) I did all he did, but i when i add a new product i get an error -
'New Product
2 errors prohibited this product from being saved:
Img url Paperclip::Errors::NotIdentifiedByImageMagickError
Img url has contents that are not what they are reported to be' , right above my new product form how do i fix it.
MY PRODUCT MODEL
class Product < ActiveRecord::Base
belongs_to :user
has_many :taggings, dependent: :destroy
has_many :tags, through: :taggings
has_attached_file :img_url, styles: { large: "800x600>", medium: "320x200>", thumb: "100x80#" }
validates_attachment_content_type :img_url, content_type: /\Aimage\/.*\z/
def self.tagged_with(name)
Tag.find_by!(name: name).products
end
def all_tags=(names)
# names="music, spotify"
self.tags = names.split(',').map do |name|
Tag.where(name: name).first_or_create!
end
end
def all_tags
tags.map(&:name).join(", ")
end
end
MY PRODUCTS_CONTROLLER
class ProductsController < ApplicationController
# before_action :authenticate_user!
before_action :set_product, only: [:show, :edit, :update, :destroy]
# GET /products
# GET /products.json
def index
if params[:tag]
#products = Product.tagged_with(params[:tag])
else
#products = Product.all
end
end
# GET /products/1
# GET /products/1.json
def show
end
# GET /products/new
def new
#product = Product.new
end
# GET /products/1/edit
def edit
end
# POST /products
# POST /products.json
def create
#product = current_user.products.new(product_params)
respond_to do |format|
if #product.save
format.html { redirect_to #product, notice: 'Product was successfully created.' }
format.json { render :show, status: :created, location: #product }
else
format.html { render :new }
format.json { render json: #product.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /products/1
# PATCH/PUT /products/1.json
def update
respond_to do |format|
if #product.update(product_params)
format.html { redirect_to #product, notice: 'Product was successfully updated.' }
format.json { render :show, status: :ok, location: #product }
else
format.html { render :edit }
format.json { render json: #product.errors, status: :unprocessable_entity }
end
end
end
# DELETE /products/1
# DELETE /products/1.json
def destroy
#product.destroy
respond_to do |format|
format.html { redirect_to products_url, notice: 'Product was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_product
#product = current_user.products.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def product_params
params.require(:product).permit(:filetype, :title, :img_url, :description, :all_tags, :price, :uploaded_by, :tutorial_url)
end
end
and i displayed my images as
<%= link_to image_tag(product.img_url.url(:medium), :class =>"img-fluid tm-img"),product%>