Balance sheet report problem

Dear ERP next team, we got urgent problem
please support
Traceback (most recent call last):
File “/home/frappe/frappe-bench/apps/frappe/frappe/app.py”, line 55, in application
response = frappe.handler.handle()
File “/home/frappe/frappe-bench/apps/frappe/frappe/handler.py”, line 19, in handle
execute_cmd(cmd)
File “/home/frappe/frappe-bench/apps/frappe/frappe/handler.py”, line 40, in execute_cmd
ret = frappe.call(method, **frappe.form_dict)
File “/home/frappe/frappe-bench/apps/frappe/frappe/init.py”, line 897, in call
return fn(*args, **newargs)
File “/home/frappe/frappe-bench/apps/frappe/frappe/desk/query_report.py”, line 93, in run
res = frappe.get_attr(method_name)(frappe._dict(filters))
File “/home/frappe/frappe-bench/apps/erpnext/erpnext/accounts/report/balance_sheet/balance_sheet.py”, line 13, in execute
asset = get_data(filters.company, “Asset”, “Debit”, period_list, only_current_fiscal_year=False)
File “/home/frappe/frappe-bench/apps/erpnext/erpnext/accounts/report/financial_statements.py”, line 125, in get_data
calculate_values(accounts_by_name, gl_entries_by_account, period_list, accumulated_values, ignore_accumulated_values_for_fy)
File “/home/frappe/frappe-bench/apps/erpnext/erpnext/accounts/report/financial_statements.py”, line 145, in calculate_values
d[period.key] = d.get(period.key, 0.0) + flt(entry.debit) - flt(entry.credit)
AttributeError: ‘NoneType’ object has no attribute ‘get’

an body from the team who can support on us please, its urgent…thanks in advance!!