Cannot see Sales Invoices

Whenever I go to http://localhost:8000/desk#List/Sales%20Invoice, I get the following error:

Traceback (most recent call last):
File "/home/pranavgoel25/frappe-bench/apps/frappe/frappe/", line 55, in application
response = frappe.handler.handle()
File "/home/pranavgoel25/frappe-bench/apps/frappe/frappe/", line 21, in handle
data = execute_cmd(cmd)
File "/home/pranavgoel25/frappe-bench/apps/frappe/frappe/", line 52, in execute_cmd
return, **frappe.form_dict)
File "/home/pranavgoel25/frappe-bench/apps/frappe/frappe/", line 907, in call
return fn(*args, **newargs)
File "/home/pranavgoel25/frappe-bench/apps/frappe/frappe/desk/form/", line 71, in getdoctype
docs = get_meta_bundle(doctype)
File "/home/pranavgoel25/frappe-bench/apps/frappe/frappe/desk/form/", line 82, in get_meta_bundle
bundle = [frappe.desk.form.meta.get_meta(doctype)]
File "/home/pranavgoel25/frappe-bench/apps/frappe/frappe/desk/form/", line 22, in get_meta
meta = FormMeta(doctype)
File "/home/pranavgoel25/frappe-bench/apps/frappe/frappe/desk/form/", line 32, in __init__
File "/home/pranavgoel25/frappe-bench/apps/frappe/frappe/desk/form/", line 42, in load_assets
File "/home/pranavgoel25/frappe-bench/apps/frappe/frappe/desk/form/", line 152, in load_templates
module = load_doctype_module(
File "/home/pranavgoel25/frappe-bench/apps/frappe/frappe/modules/", line 184, in load_doctype_module
raise ImportError, 'Module import failed for {0} ({1})'.format(doctype, module_name)
ImportError: Module import failed for Sales Invoice (erpnext.accounts.doctype.sales_invoice.sales_invoice)

Have you did bench upgrade? if yes, then upgrade seems to have had some problems and did not finish correctly.

@shraddha I am getting the same error if you have resolved it, kindly help me how to get it resolved.