diff --git a/Controller/ApiBillController.php b/Controller/ApiBillController.php
index db8fe09..51e2345 100755
--- a/Controller/ApiBillController.php
+++ b/Controller/ApiBillController.php
@@ -674,7 +674,7 @@ final class ApiBillController extends Controller
                 ->where('id', $billTypeId)
                 ->execute();
 
-            $templateId = $billType->defaultTemplate->getId();
+            $templateId = $billType->defaultTemplate?->getId();
         }
 
         /** @var \Modules\Media\Models\Collection $template */
@@ -806,7 +806,7 @@ final class ApiBillController extends Controller
                 ->where('id', $billTypeId)
                 ->execute();
 
-            $templateId = $billType->defaultTemplate->getId();
+            $templateId = $billType->defaultTemplate?->getId();
         }
 
         /** @var \Modules\Media\Models\Collection $template */
diff --git a/Models/BillElement.php b/Models/BillElement.php
index dca2117..89ef0f8 100755
--- a/Models/BillElement.php
+++ b/Models/BillElement.php
@@ -274,12 +274,12 @@ class BillElement implements \JsonSerializable
         if (!empty($element->bill)
             && $item->getAttribute('subscription')?->value->getValue() === 1
         ) {
-            $element->subscription = new Subscription();
-            $element->subscription->bill = $element->bill;
-            $element->subscription->item = $element->item;
-            $element->subscription->start = $element->quantity;
-            $element->subscription->end = $element->quantity;
-            $element->subscription->quantity = $element->quantity;
+            $element->subscription            = new Subscription();
+            $element->subscription->bill      = $element->bill;
+            $element->subscription->item      = $element->item;
+            $element->subscription->start     = $element->quantity;
+            $element->subscription->end       = $element->quantity;
+            $element->subscription->quantity  = $element->quantity;
             $element->subscription->autoRenew = $item->getAttribute('subscription_renewal_type')->value->getValue() === 1;
         }