Traceback (innermost last):
  File "/home/aditya/frappe-bench/apps/frappe/frappe/app.py", line 51, in application
    response = frappe.handler.handle()
  File "/home/aditya/frappe-bench/apps/frappe/frappe/handler.py", line 66, in handle
    execute_cmd(cmd)
  File "/home/aditya/frappe-bench/apps/frappe/frappe/handler.py", line 89, in execute_cmd
    ret = frappe.call(method, **frappe.form_dict)
  File "/home/aditya/frappe-bench/apps/frappe/frappe/__init__.py", line 527, in call
    return fn(*args, **newargs)
  File "/home/aditya/frappe-bench/apps/frappe/frappe/widgets/query_report.py", line 101, in run
    result = get_filtered_data(report.ref_doctype, columns, result)
 UnboundLocalError: local variable 'columns' referenced before assignment