final

lib/pages/coupons.dart

@@ -10,7 +10,7 @@ import '../widgets/mobile/mobile_coupons.dart';
 class Coupons extends StatelessWidget {
   final int contactId;
 
-  const Coupons(this.contactId, {Key key}) :
+  const Coupons(this.contactId, {Key? key}) :
       super(key: key);
 
 
@@ -20,10 +20,10 @@ class Coupons extends StatelessWidget {
 
     return ResponsiveBuilder(
       builder: (context, sizingInformation) =>
-          ScreenTypeLayout(
-            mobile: MobileCoupons(contactId,),
-            tablet: DesktopCoupons(contactId,),
-            desktop: DesktopCoupons(contactId,),
+          ScreenTypeLayout.builder(
+            mobile: (context) => MobileCoupons(contactId,),
+            tablet: (context) => DesktopCoupons(contactId,),
+            desktop: (context) => DesktopCoupons(contactId,),
           ),
     );
   }