Problem with custom app

I have installed custom app using
bench new-app my_app added in apps.txt my_app bench --site site_name install-app my_app bench update bench restart
and when I try open my app in web I got this error:

Traceback (innermost last):
File “/frappe-bench/apps/frappe/frappe/”, line 57, in application
response = frappe.handler.handle()
File “/frappe-bench/apps/frappe/frappe/”, line 19, in handle
File “/frappe-bench/apps/frappe/frappe/”, line 36, in execute_cmd
ret =, **frappe.form_dict)
File “/frappe-bench/apps/frappe/frappe/”, line 806, in call
return fn(*args, **newargs)
TypeError: get() takes exactly 1 argument (0 given)

Could be an error in your app?

thanks for reply, but I don’t see error in my app(because I have just created any changes) and also when I try bench migrate my app doesn’t appear

Yes, problem was with doctype in my app… anyway thank you very much for reply