Odoo服务器错误：无法在父视图中找到元素“ <t t-name =“ theme_tutorial.services_page_template”>”

Question

我正在Windows上运行odoo v12.0。遵循有关如何"Create a specific page layout"的教程时，出现错误：

"Element '<t t-name="theme_tutorial.services_page_template">' cannot be located in parent view"

您能帮我解决该错误吗？

Error:
Odoo Server Error

Traceback (most recent call last):
  File "D:\NS Works\Code\Odoo\odoo\models.py", line 1108, in _validate_fields
    check(self)
  File "d:\ns works\code\odoo\odoo\addons\base\models\ir_ui_view.py", line 345, in _check_xml
    view_def = view.read_combined(['arch'])
  File "d:\ns works\code\odoo\odoo\addons\base\models\ir_ui_view.py", line 791, in read_combined
    arch_tree = self.apply_inheritance_specs(arch_tree, view_arch, parent_view['id'])
  File "d:\ns works\code\odoo\odoo\addons\base\models\ir_ui_view.py", line 720, in apply_inheritance_specs
    self.raise_view_error(_("Element '%s' cannot be located in parent view") % tag, inherit_id)
  File "d:\ns works\code\odoo\odoo\addons\base\models\ir_ui_view.py", line 548, in raise_view_error
    raise ValueError(message)
ValueError: Element '`<t t-name="theme_tutorial.services_page_template">'`" cannot be located in parent view
...

    <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="type">qweb</field>
        <field name="key">theme_tutorial.services_page</field>
        <field name="arch" type="xml">
            <t t-name="theme_tutorial.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>
            </t>
        </field>
    </record>

感谢和问候。