When I add website.layout to my templates I get the following error

QWebException: "'NoneType' object has no attribute 'name'" while evaluating
'res_company.name'

the template code:

<template id="index" >
        <t t-call="website.layout">
            <t t-set="title">Academy</t>
            <div class="oe_structure">
                <div class="container">
                    <ul><t t-foreach="brands" t-as="b">
                        <li><a t-attf-href="/pa/{{b.id}}">
                            <t t-esc="b.name"/>
                        </a></li>
                    </t></ul>
                </div>
            </div>
        </t>
    </template>

from openerp import fields, models

class Brand(models.Model):
    _name = 'product_application.brand'

    name = fields.Char()
    models_ids = fields.One2many('product_application.model', 'brand_id', string="Models")


class Model(models.Model):
    _name = 'product_application.model'

    name = fields.Char()
    brand_id = fields.Many2one('product_application.brand', string="Brand")
    versions_ids = fields.One2many('product_application.version', 'model_id', string="Versions")


class Version(models.Model):
    _name='product_application.version'

    name = fields.Char()
    model_id = fields.Many2one('product_application.model',string="Model")