diff --git a/src/Core/HttpClients/GuzzleHttpClient.php b/src/Core/HttpClients/GuzzleHttpClient.php
index <HASH>..<HASH> 100644
--- a/src/Core/HttpClients/GuzzleHttpClient.php
+++ b/src/Core/HttpClients/GuzzleHttpClient.php
@@ -71,7 +71,7 @@
             return $this->getLastResponse();
         } catch(RequestException $e){
             if($e->hasResponse()){
-                throw new SdkException("A networking error occurs during Guzzle client request:" . Psr7\str($e->getResponse));
+                throw new SdkException("A networking error occurs during Guzzle client request:" . Psr7\str($e->getResponse()));
             }else{
                 throw new SdkException("Network Error:" . $e->getMessage());
             }
Fix a bug where RequestException method getResponse() is incorrectly referenced as if it were a property