diff --git a/app/Nova/Actions/CheckOnlinePayment.php b/app/Nova/Actions/CheckOnlinePayment.php
index 2f12f2d..d883611 100644
--- a/app/Nova/Actions/CheckOnlinePayment.php
+++ b/app/Nova/Actions/CheckOnlinePayment.php
@@ -96,7 +96,7 @@ class CheckOnlinePayment extends Action
      */
     public static function resultHTML($response)
     {
-        $errorMessage = $response['ErrorMessage'];
+        $errorMessage = $response['ErrorMessage'] ?? '';
 
         $keyValueListHTML = '';
         $response->collect()->each(function ($item, $key) use (&$keyValueListHTML) {