Getting error after installing a custom app

I’m getting this error when opening my custom app . please help

Traceback (most recent call last):
File “/home/ommiforge/frappe-bench/apps/frappe/frappe/”, line 57, in application
response = frappe.handler.handle()
File “/home/ommiforge/frappe-bench/apps/frappe/frappe/”, line 19, in handle
File “/home/ommiforge/frappe-bench/apps/frappe/frappe/”, line 36, in execute_cmd
ret =, **frappe.form_dict)
File “/home/ommiforge/frappe-bench/apps/frappe/frappe/”, line 855, in call
return fn(*args, **newargs)
TypeError: get() takes exactly 1 argument (0 given)

Is there anyone who could help me to resolve this , please ?

I wonder , no one is willing to help me ?