update

lib/pages/faq/faq_detail_page.dart

@@ -13,14 +13,14 @@ import 'package:provider/provider.dart';
 
 class FAQDetailPage extends StatefulWidget {
   final FAQ faq;
-  const FAQDetailPage({this.faq});
+  const FAQDetailPage({required this.faq});
   @override
   _FAQDetailPageState createState() => _FAQDetailPageState();
 }
 
 class _FAQDetailPageState extends State<FAQDetailPage> {
   bool _isLoading = false;
-  FAQ faq;
+  FAQ faq = new FAQ();
 
   intState() {
     super.initState();