PM-11602 | Error toast when expired org attempts to auto scale is unc…

…lear (#4746)

src/Core/Services/Implementations/StripePaymentService.cs

@@ -783,6 +783,11 @@ private async Task<string> FinalizeSubscriptionChangeAsync(ISubscriber subscribe
             throw new GatewayException("Subscription not found.");
         }
 
+        if (sub.Status == SubscriptionStatuses.Canceled)
+        {
+            throw new BadRequestException("You do not have an active subscription. Reinstate your subscription to make changes.");
+        }
+
         var collectionMethod = sub.CollectionMethod;
         var daysUntilDue = sub.DaysUntilDue;
         var chargeNow = collectionMethod == "charge_automatically";