diff --git a/Admin/Install/Media/bill.pdf.php b/Admin/Install/Media/bill.pdf.php
index 17e7ca0..721c526 100755
--- a/Admin/Install/Media/bill.pdf.php
+++ b/Admin/Install/Media/bill.pdf.php
@@ -18,9 +18,10 @@ use phpOMS\Localization\ISO3166TwoEnum;
 use phpOMS\Localization\Money;
 
 /** @var \phpOMS\Views\View $this */
-require_once $this->getData('defaultTemplates')
-    ->findFile('.pdf.php')
-    ->getAbsolutePath();
+/** @var \Modules\Media\Models\Collection $media */
+$media = $this->getData('defaultTemplates');
+
+require_once $media->findFile('.pdf.php')->getAbsolutePath();
 
 /** @var \Modules\Billing\Models\Bill $bill */
 $bill = $this->data['bill'] ?? new NullBill();
diff --git a/Controller/ApiBillController.php b/Controller/ApiBillController.php
index 7733fff..64fafde 100755
--- a/Controller/ApiBillController.php
+++ b/Controller/ApiBillController.php
@@ -534,6 +534,7 @@ final class ApiBillController extends Controller
 
         $path = $this->createBillDir($bill);
 
+        /** @var \Modules\Media\Models\Collection[] */
         $billCollection = CollectionMapper::getAll()
             ->where('virtual', $path)
             ->execute();
@@ -1060,7 +1061,7 @@ final class ApiBillController extends Controller
 
         if ($client->getAttribute('bill_emails')->value->getValue() === 1) {
             $email = empty($tmp = $client->getAttribute('bill_email_address')->value->getValue())
-                ? $tmp
+                ? (string) $tmp
                 : $client->account->getEmail();
 
             $this->sendBillEmail($media, $email, $response->header->l11n->language);
diff --git a/Controller/ApiPriceController.php b/Controller/ApiPriceController.php
index a6fec08..7c304a6 100755
--- a/Controller/ApiPriceController.php
+++ b/Controller/ApiPriceController.php
@@ -153,7 +153,7 @@ final class ApiPriceController extends Controller
         // Find base price (@todo: probably not a good solution)
         $bestBasePrice = null;
         foreach ($prices as $price) {
-            if ($price->price !== 0 && $price->priceNew === 0
+            if ($price->price->value !== 0 && $price->priceNew === 0
                 && $price->item->id !== 0
                 && $price->itemgroup->id === 0
                 && $price->itemsegment->id === 0
@@ -165,7 +165,7 @@ final class ApiPriceController extends Controller
                 && $price->clientsection->id === 0
                 && $price->clienttype->id === 0
                 && $price->promocode === ''
-                && $price->price < ($bestBasePrice?->price ?? \PHP_INT_MAX)
+                && $price->price->value < ($bestBasePrice?->price->value ?? \PHP_INT_MAX)
             ) {
                 $bestBasePrice = $price;
             }
@@ -178,10 +178,10 @@ final class ApiPriceController extends Controller
         $bestPriceValue = \PHP_INT_MAX;
 
         foreach ($prices as $price) {
-            $newPrice = $bestBasePrice->price;
+            $newPrice = $bestBasePrice->price->value;
 
-            if ($price->price < $newPrice) {
-                $newPrice = $price->price;
+            if ($price->price->value < $newPrice) {
+                $newPrice = $price->price->value;
             }
 
             if ($price->priceNew < $newPrice) {
diff --git a/Controller/ApiPurchaseController.php b/Controller/ApiPurchaseController.php
index 92a5207..91057ab 100755
--- a/Controller/ApiPurchaseController.php
+++ b/Controller/ApiPurchaseController.php
@@ -100,8 +100,11 @@ final class ApiPurchaseController extends Controller
 
             /** @var \Modules\Media\Models\Media[] $uploaded */
             $uploaded = $mediaResponse->get('')['response']['upload'];
-            $in       = \reset($uploaded)->getAbsolutePath(); // pdf is parsed in $in->content
+            if (empty($uploaded)) {
+                throw new \Exception();
+            }
 
+            $in = \reset($uploaded)->getAbsolutePath(); // pdf parsed content is available in $in->content
             if (!\is_file($in)) {
                 throw new \Exception();
             }
diff --git a/Controller/ApiTaxController.php b/Controller/ApiTaxController.php
index d657891..2b7a040 100755
--- a/Controller/ApiTaxController.php
+++ b/Controller/ApiTaxController.php
@@ -277,11 +277,20 @@ final class ApiTaxController extends Controller
                 __DIR__ . '/../Admin/Install/Taxes'
             )
         ) {
+            $this->createInvalidUpdateResponse($request, $response, []);
+
+            return;
+        }
+
+        $content = \file_get_contents($path);
+        if ($content === false) {
+            $this->createInvalidUpdateResponse($request, $response, []);
+
             return;
         }
 
         /** @var array $combinations */
-        $combinations = \json_decode(\file_get_contents($path), true);
+        $combinations = \json_decode($content, true);
 
         foreach ($combinations as $combination) {
             /** @var TaxCombination[] $old */