diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.js b/erpnext/accounts/doctype/sales_invoice/sales_invoice.js
index da2e362cf27..a074c9b1c0a 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.js
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.js
@@ -65,9 +65,10 @@ erpnext.accounts.SalesInvoiceController = class SalesInvoiceController extends (
 	refresh(doc, dt, dn) {
 		const me = this;
 		super.refresh();
-		if (cur_frm.msgbox && cur_frm.msgbox.$wrapper.is(":visible")) {
+
+		if (this.frm?.msgbox && this.frm.msgbox.$wrapper.is(":visible")) {
 			// hide new msgbox
-			cur_frm.msgbox.hide();
+			this.frm.msgbox.hide();
 		}
 
 		this.frm.toggle_reqd("due_date", !this.frm.doc.is_return);