Try ERPNext Buy Support Partners Foundation

Not able Submit Material Request on v12

while creating Material Request above fatal error coming on one of our site which hosted on frappecloud.com. Not able to resolve fatal error below traceback is generating on console

Traceback (most recent call last):
  File "/home/frappe/frappe-bench/apps/frappe/frappe/app.py", line 67, in application
    response = frappe.api.handle()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/api.py", line 59, in handle
    return frappe.handler.handle()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/handler.py", line 24, in handle
    data = execute_cmd(cmd)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/handler.py", line 64, in execute_cmd
    return frappe.call(method, **frappe.form_dict)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/__init__.py", line 1071, in call
    return fn(*args, **newargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/desk/form/save.py", line 21, in savedocs
    doc.save()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 273, in save
    return self._save(*args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 296, in _save
    self.insert()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 230, in insert
    self.run_before_save_methods()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 896, in run_before_save_methods
    self.run_method("validate")
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 797, in run_method
    out = Document.hook(fn)(self, *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 1073, in composer
    return composed(self, method, *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 1056, in runner
    add_to_return_value(self, fn(self, *args, **kwargs))
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 791, in <lambda>
    fn = lambda self, *args, **kwargs: getattr(self, method)(*args, **kwargs)
  File "/home/frappe/frappe-bench/apps/erpnext/erpnext/stock/doctype/material_request/material_request.py", line 62, in validate
    super(MaterialRequest, self).validate()
  File "/home/frappe/frappe-bench/apps/erpnext/erpnext/controllers/buying_controller.py", line 38, in validate
    super(BuyingController, self).validate()
  File "/home/frappe/frappe-bench/apps/erpnext/erpnext/controllers/stock_controller.py", line 21, in validate
    super(StockController, self).validate()
  File "/home/frappe/frappe-bench/apps/erpnext/erpnext/controllers/accounts_controller.py", line 112, in validate
    validate_einvoice_fields(self)
  File "/home/frappe/frappe-bench/apps/erpnext/erpnext/__init__.py", line 129, in caller
    return frappe.get_attr(regional_overrides[region][fn_name])(*args, **kwargs)
  File "/home/frappe/frappe-bench/apps/erpnext/erpnext/regional/india/e_invoice/utils.py", line 26, in validate_einvoice_fields
    no_taxes_applied = len(doc.get('taxes', [])) == 0
TypeError: object of type 'NoneType' has no len()

Thanks for help in advance