diff --git a/src/Response/CsvResponse.php b/src/Response/CsvResponse.php
index d47f11b..65066e1 100644
--- a/src/Response/CsvResponse.php
+++ b/src/Response/CsvResponse.php
@@ -46,6 +46,9 @@ public function __construct(protected Parser $parser, protected string $response
     public function isError(): bool
     {
         foreach ($this->data as $data) {
+            if (!is_array($data)) {
+                continue;
+            }
             if (!$this->isErrorLine($data)) {
                 continue;
             }