Problems when adding Product Categories to a branch that is not root

Hi,

When I try to add a new Item Group to a group that is not root, I get the following error:

       Server Error: Please check your server logs or contact tech support.   Traceback (innermost last):
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/app.py", line 51, in application
    response = frappe.handler.handle()
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/handler.py", line 62, in handle
    execute_cmd(cmd)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/handler.py", line 85, in execute_cmd
    ret = frappe.call(method, **frappe.form_dict)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/__init__.py", line 718, in call
    return fn(*args, **newargs)
  File "/home/erpnext/frappe-bench/apps/erpnext/erpnext/selling/page/sales_browser/sales_browser.py", line 37, in add_node
    doc.save()
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 214, in save
    self.insert()
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 176, in insert
    self.run_before_save_methods()
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 540, in run_before_save_methods
    self.run_method("validate")
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 506, in run_method
    return Document.hook(fn)(self, *args, **kwargs)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 619, in composer
    return composed(self, method, *args, **kwargs)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 602, in runner
    add_to_return_value(self, fn(self, *args, **kwargs))
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 500, in 
    fn = lambda self, *args, **kwargs: getattr(self, method)(*args, **kwargs)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/website/website_generator.py", line 32, in validate
    self.set_parent_website_route()
  File "/home/erpnext/frappe-bench/apps/erpnext/erpnext/setup/doctype/item_group/item_group.py", line 46, in set_parent_website_route
    super(WebsiteGenerator, self)()
 TypeError: 'super' object is not callable

Many thanks and regards,

Please, disregard this message. I have just updated and it is solved.

Many thanks and kind regards,