fix: add validation for party type

erpnext/accounts/party.py

@@ -424,6 +424,8 @@ def get_party_account(party_type, party=None, company=None, include_advance=Fals
 	Will first search in party (Customer / Supplier) record, if not found,
 	will search in group (Customer Group / Supplier Group),
 	finally will return default."""
+	if not party_type:
+		frappe.throw(_("Party Type is mandatory"))
 	if not company:
 		frappe.throw(_("Please select a Company"))