Getting an error when attempting to implement will_paginate gem

<h1>Home page.</h1>

<ul>
    <% @links.each do |link| %>
        <li><%= link_to link.title, link.url %></li>
    <% end %>
</ul>

<%= link_to "Submit a new link", new_link_path %>

<% # Render pagination in the view %>
<%= will_paginate @links %>

class LinksController < ApplicationController
    def index
        @links = Link.all

        # Use an explicit "per page" limit:
        @links = Link.all.paginate(:page => params[:page], :per_page => 30)
    end

    def new
        @link = Link.new
    end

    def create
        @link = Link.new(link_params)

        if @link.save
            redirect_to @link
        else
            render 'new'
        end
    end

    def show
        @link = Link.find(params[:id])
    end

    private

    def link_params
        params.require(:link).permit(:title, :url)
    end
end