Ig0r-M-magic42

diff --git a/src/FacebookAds/Object/ServerSide/AdsPixelSettings.php b/src/FacebookAds/Object/ServerSide/AdsPixelSettings.php
index f995a18..21015e5 100644
--- a/src/FacebookAds/Object/ServerSide/AdsPixelSettings.php
+++ b/src/FacebookAds/Object/ServerSide/AdsPixelSettings.php
@@ -151,7 +151,7 @@ class AdsPixelSettings implements ArrayAccess {
    * @param integer $offset Offset
    * @return boolean
    */
-  public function offsetExists($offset) {
+  public function offsetExists($offset): bool {

Ig0r-M-magic42

diff --git a/Helper/MagentoDataHelper.php b/Helper/MagentoDataHelper.php
index 992edc3..b2d94fa 100644
--- a/Helper/MagentoDataHelper.php
+++ b/Helper/MagentoDataHelper.php
@@ -478,7 +478,7 @@ class MagentoDataHelper extends AbstractHelper
     }
 
     private function hashValue($string){
-        return hash('sha256', strtolower($string));
+        return hash('sha256', strtolower($string ?? ''));