Creating new page error

When Im creating a new page. Im getting trace. Im not able to create new page. It is fresh installation.

Traceback (innermost last):
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/desk/form/save.py”, line 18, in savedocs
doc.save()
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/model/document.py”, line 216, in save
self.insert()
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/model/document.py”, line 178, in insert
self.run_before_save_methods()
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/model/document.py”, line 543, in run_before_save_methods
self.run_method(“validate”)
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/model/document.py”, line 509, in run_method
return Document.hook(fn)(self, *args, **kwargs)
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/model/document.py”, line 625, in composer
return composed(self, method, *args, **kwargs)
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/model/document.py”, line 608, in runner
add_to_return_value(self, fn(self, *args, **kwargs))
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/model/document.py”, line 503, in
fn = lambda self, *args, **kwargs: getattr(self, method)(*args, **kwargs)
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/core/doctype/page/page.py”, line 30, in validate
if not getattr(conf,‘developer_mode’, 0):
NameError: global name ‘conf’ is not defined

Traceback (innermost last):
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/app.py”, line 51, in application
response = frappe.handler.handle()
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/handler.py”, line 69, in handle
execute_cmd(cmd)
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/handler.py”, line 92, in execute_cmd
ret = frappe.call(method, **frappe.form_dict)
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/init.py”, line 751, in call
return fn(*args, **newargs)
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/desk/form/save.py”, line 18, in savedocs
doc.save()
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/model/document.py”, line 216, in save
self.insert()
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/model/document.py”, line 178, in insert
self.run_before_save_methods()
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/model/document.py”, line 543, in run_before_save_methods
self.run_method(“validate”)
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/model/document.py”, line 509, in run_method
return Document.hook(fn)(self, *args, **kwargs)
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/model/document.py”, line 625, in composer
return composed(self, method, *args, **kwargs)
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/model/document.py”, line 608, in runner
add_to_return_value(self, fn(self, *args, **kwargs))
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/model/document.py”, line 503, in
fn = lambda self, *args, **kwargs: getattr(self, method)(*args, **kwargs)
File “/home/vaijuips/frappe-bench/apps/frappe/frappe/core/doctype/page/page.py”, line 30, in validate
if not getattr(conf,‘developer_mode’, 0):
NameError: global name ‘conf’ is not defined

The issue has already been resolved in develop branch, pending to be released.