Theme tutorial v12 example raising an error on URL http://localhost:8071/services

<?xml version="1.0" encoding="utf-8" ?>
<odoo>

    <!-- === Services Page === -->
    <template id="services_page_template">
        <t t-call="website.layout">
            <div id="wrap">
                <div class="container">
                    <h1>Our Services</h1>
                    <ul class="services">
                        <li>Cloud Hosting</li>
                        <li>Support</li>
                        <li>Unlimited space</li>
                    </ul>

                    <!-- === Snippets' area === -->
                    <div class="oe_structure" />
                </div>
            </div>
        </t>
    </template>
    <record id="services_page" model="website.page">
        <field name="name">Services page</field>
        <field name="website_published">True</field>
        <field name="url">/services</field>
        <field name="view_id" ref="services_page_template"/>
    </record>

</odoo>

Error:
node = et.find(exception.path.replace('/templates/t/', './'))
AttributeError: 'NoneType' object has no attribute 'replace' - - -



But when we create a menu it created sucessfully the menu .By using theme tutorial example code.
But when we clicks the menu: service in navigation bar It show internal error.

<record id="services_page_link" model="website.menu">
  <field name="name">Services</field>
  <field name="page_id" ref="services_page"/>
  <field name="parent_id" ref="website.main_menu" />
  <field name="sequence" type="int">99</field>
</record>

Same here also how to create a separate menu for multiple website via code.Any idea?