Error while Deployment

Greeting,

I just install ERPNext by bench in ubuntu 14.4 (AWS) and i get this Error in desk :

Traceback (most recent call last): File "/home/ubuntu/frappe-bench/apps/frappe/frappe/app.py", line 55, in application response = frappe.handler.handle() File "/home/ubuntu/frappe-bench/apps/frappe/frappe/handler.py", line 19, in handle execute_cmd(cmd) File "/home/ubuntu/frappe-bench/apps/frappe/frappe/handler.py", line 36, in execute_cmd ret = frappe.call(method, **frappe.form_dict) File "/home/ubuntu/frappe-bench/apps/frappe/frappe/__init__.py", line 854, in call return fn(*args, **newargs) TypeError: get() takes exactly 1 argument (0 given)

please advise.

Regards,
Mohammed Redha