Exception during request handling.
Traceback (most recent call last):
  File "<2697>", line 95, in template_2697
  File "<2697>", line 77, in template_2697_content
  File "<2697>", line 53, in template_2697_t_call_0
  File "<2697>", line 14, in template_2697_t_set_1
  File "/data/build/duong-addons/d_website_event_sale_schema/models/event_event.py", line 31, in get_event_schema
    "validFrom": str(ticket.start_sale_datetime.strftime("%F %R")) if ticket.start_sale_datetime else str(ticket.create_date.strftime("%F %R"))
                                                                      ^^^^^^
NameError: name 'ticket' is not defined. Did you mean: 'tickets'?

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/data/build/odoo/odoo/http.py", line 2410, in __call__
    response = request._serve_db()
               ^^^^^^^^^^^^^^^^^^^
  File "/data/build/odoo/odoo/http.py", line 1985, in _serve_db
    return service_model.retrying(self._serve_ir_http, self.env)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/build/odoo/odoo/service/model.py", line 153, in retrying
    result = func()
             ^^^^^^
  File "/data/build/odoo/odoo/http.py", line 2013, in _serve_ir_http
    response = self.dispatcher.dispatch(rule.endpoint, args)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/build/odoo/odoo/http.py", line 2130, in dispatch
    return self.request.registry['ir.http']._dispatch(endpoint)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/build/odoo/addons/website/models/ir_http.py", line 235, in _dispatch
    response = super()._dispatch(endpoint)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/build/odoo/odoo/addons/base/models/ir_http.py", line 223, in _dispatch
    result.flatten()
  File "/data/build/odoo/odoo/tools/facade.py", line 83, in wrap_func
    func(self._wrapped__, *args, **kwargs)
  File "/data/build/odoo/odoo/http.py", line 1373, in flatten
    self.response.append(self.render())
                         ^^^^^^^^^^^^^
  File "/data/build/odoo/odoo/http.py", line 1365, in render
    return request.env["ir.ui.view"]._render_template(self.template, self.qcontext)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/build/odoo/addons/website/models/ir_ui_view.py", line 446, in _render_template
    return super()._render_template(template, values=values)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/build/odoo/odoo/addons/base/models/ir_ui_view.py", line 2080, in _render_template
    return self.env['ir.qweb']._render(template, values)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/build/odoo/odoo/tools/profiler.py", line 313, in _tracked_method_render
    return method_render(self, template, values, **options)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/build/odoo/odoo/addons/base/models/ir_qweb.py", line 615, in _render
    result = ''.join(rendering)
             ^^^^^^^^^^^^^^^^^^
  File "<2698>", line 822, in template_2698
  File "<2698>", line 811, in template_2698_content
  File "<2697>", line 101, in template_2697
odoo.addons.base.models.ir_qweb.QWebException: Error while render the template
NameError: name 'ticket' is not defined
Template: website_event.event_details
Path: /t/t/t/t/script/t
Node: <t t-out="json.dumps(event.get_event_schema(), ensure_ascii = False, indent=4)"/>