diff --git a/Classes/Integration/NetlogixIntegration.php b/Classes/Integration/NetlogixIntegration.php
index 8eecd9f..382ec2b 100644
--- a/Classes/Integration/NetlogixIntegration.php
+++ b/Classes/Integration/NetlogixIntegration.php
@@ -46,7 +46,9 @@ public function setupOnce(): void
             }
 
             $event = self::handleEvent($event, $hint);
-            $event = self::encryptPostBody($event, $hint);
+            if ($event !== null) {
+                $event = self::encryptPostBody($event, $hint);
+            }
 
             return $event;
         });