500: Internal Server Error

QWeb

Error message:

Error to render compiling AST
TypeError: unsupported operand type(s) for &: 'NoneType' and 'product.attribute.value'
Template: website_sale.products
Path: /t/t/div/div[3]/div[2]/div[1]/div[3]/form/ul/t[1]/li/t[2]/ul/t/li
Node: <li class="nav-item" t-if="attr_values_used &amp; v">
                                                <label style="margin: 0 20px;" t-attf-class="nav-link#{' active' if v.id in attrib_set else ''}">
                                                    <input type="checkbox" name="attrib" t-att-value="'%s-%s' % (a.id,v.id)" t-att-checked="'checked' if v.id in attrib_set else None"/>
                                                    <span style="font-weight: normal" t-field="v.display_name"/>
            </label>
                                            </li>
                                        

The error occured while rendering the template website_sale.products and evaluating the following expression: <li class="nav-item" t-if="attr_values_used &amp; v"> <label style="margin: 0 20px;" t-attf-class="nav-link#{' active' if v.id in attrib_set else ''}"> <input type="checkbox" name="attrib" t-att-value="'%s-%s' % (a.id,v.id)" t-att-checked="'checked' if v.id in attrib_set else None"/> <span style="font-weight: normal" t-field="v.display_name"/> </label> </li>

Traceback

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/qweb.py", line 332, in _compiled_fn
    return compiled(self, append, new, options, log)
  File "<template>", line 1, in template_website_sale_products_60683
  File "<template>", line 2, in body_call_content_60681
  File "<template>", line 200, in foreach_60644
  File "<template>", line 217, in foreach_60640
TypeError: unsupported operand type(s) for &: 'NoneType' and 'product.attribute.value'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_http.py", line 234, in _dispatch
    result = request.dispatch()
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 809, in dispatch
    r = self._call_function(**self.params)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 350, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/service/model.py", line 94, in wrapper
    return f(dbname, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 342, in checked_call
    result.flatten()
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1236, in flatten
    self.response.append(self.render())
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1229, in render
    return env["ir.ui.view"].render_template(self.template, self.qcontext)
  File "/mnt/extra-addons/globalbases/gb_website_extrascript/models/ir_ui_view.py", line 16, in render_template
    res = super(IrUiView, self).render_template(template, values, engine)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_ui_view.py", line 1177, in render_template
    return self.browse(self.get_view_id(template)).render(values, engine)
  File "/mnt/extra-addons/globalbases/gb_it_recht/models/res_config_settings.py", line 48, in render
    return super(GBView, self).render(values=values, engine=engine, minimal_qcontext=minimal_qcontext)
  File "/mnt/extra-addons/globalbases/gb_website_placeholders/models/view.py", line 32, in render
    return super(View, self).render(values=values, engine=engine, minimal_qcontext=minimal_qcontext)
  File "/usr/lib/python3/dist-packages/odoo/addons/website/models/ir_ui_view.py", line 336, in render
    return super(View, self).render(values, engine=engine, minimal_qcontext=minimal_qcontext)
  File "/usr/lib/python3/dist-packages/odoo/addons/web_editor/models/ir_ui_view.py", line 27, in render
    return super(IrUiView, self).render(values=values, engine=engine, minimal_qcontext=minimal_qcontext)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_ui_view.py", line 1185, in render
    return self.env[engine].render(self.id, qcontext)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_qweb.py", line 58, in render
    result = super(IrQWeb, self).render(id_or_xml_id, values=values, **context)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/qweb.py", line 260, in render
    self.compile(template, options)(self, body.append, values or {})
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/qweb.py", line 339, in _compiled_fn
    raise QWebException("Error to render compiling AST", e, path, node and etree.tostring(node[0], encoding='unicode'), name)
odoo.addons.base.models.qweb.QWebException: unsupported operand type(s) for &: 'NoneType' and 'product.attribute.value'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/qweb.py", line 332, in _compiled_fn
    return compiled(self, append, new, options, log)
  File "<template>", line 1, in template_website_sale_products_60683
  File "<template>", line 2, in body_call_content_60681
  File "<template>", line 200, in foreach_60644
  File "<template>", line 217, in foreach_60640
TypeError: unsupported operand type(s) for &: 'NoneType' and 'product.attribute.value'

Error to render compiling AST
TypeError: unsupported operand type(s) for &: 'NoneType' and 'product.attribute.value'
Template: website_sale.products
Path: /t/t/div/div[3]/div[2]/div[1]/div[3]/form/ul/t[1]/li/t[2]/ul/t/li
Node: <li class="nav-item" t-if="attr_values_used &amp; v">
                                                <label style="margin: 0 20px;" t-attf-class="nav-link#{' active' if v.id in attrib_set else ''}">
                                                    <input type="checkbox" name="attrib" t-att-value="'%s-%s' % (a.id,v.id)" t-att-checked="'checked' if v.id in attrib_set else None"/>
                                                    <span style="font-weight: normal" t-field="v.display_name"/>
            </label>
                                            </li>