I have an Odoo online test database going from version 16 to 17.1 

In the website ecommerce module, when selecting the webpage for an individual product, it will throw up the following Server Error. It will do this from both the backend product page when selecting 'Go To Website', as well as from the Website Shop catalogue page. I have tried it on multiple products but get the same response.

500: Internal Server Error

Traceback (most recent call last):
  File "/home/odoo/src/odoo/17.0/odoo/http.py", line 1765, in _serve_db
    return service_model.retrying(self._serve_ir_http, self.env)
  File "/home/odoo/src/odoo/17.0/odoo/service/model.py", line 133, in retrying
    result = func()
  File "/home/odoo/src/odoo/17.0/odoo/http.py", line 1792, in _serve_ir_http
    response = self.dispatcher.dispatch(rule.endpoint, args)
  File "/home/odoo/src/odoo/17.0/odoo/http.py", line 1909, in dispatch
    return self.request.registry['ir.http']._dispatch(endpoint)
  File "/home/odoo/src/odoo/17.0/addons/website/models/ir_http.py", line 235, in _dispatch
    response = super()._dispatch(endpoint)
  File "/home/odoo/src/odoo/17.0/odoo/addons/base/models/ir_http.py", line 224, in _dispatch
    result.flatten()
  File "/home/odoo/src/odoo/17.0/odoo/http.py", line 1291, in flatten
    self.response.append(self.render())
  File "/home/odoo/src/odoo/17.0/odoo/http.py", line 1283, in render
    return request.env["ir.ui.view"]._render_template(self.template, self.qcontext)
  File "/home/odoo/src/odoo/17.0/addons/website/models/ir_ui_view.py", line 442, in _render_template
    return super()._render_template(template, values=values)
  File "/home/odoo/src/odoo/17.0/odoo/addons/base/models/ir_ui_view.py", line 2050, in _render_template
    return self.env['ir.qweb']._render(template, values)
  File "/home/odoo/src/odoo/17.0/odoo/tools/profiler.py", line 292, in _tracked_method_render
    return method_render(self, template, values, **options)
  File "/home/odoo/src/odoo/17.0/odoo/addons/base/models/ir_qweb.py", line 592, in _render
    rendering = render_template(irQweb, values)
  File "", line 5, in not_found_template
ValueError: Element '' cannot be located in parent view