diff --git a/src/Rest/OAuthRestClient.php b/src/Rest/OAuthRestClient.php
index 0f3c0c8..72eb891 100644
--- a/src/Rest/OAuthRestClient.php
+++ b/src/Rest/OAuthRestClient.php
@@ -183,7 +183,8 @@ private function getRefreshToken(string $refreshToken): OAuthAccessToken
     private function getOAuthAccessTokenFromResponse(ResponseInterface $response): OAuthAccessToken
     {
         if ($response->getStatusCode() !== 200) {
-            throw OAuthRestClientException::unableToLoadAccessToken();
+            $message = '(' . $response->getStatusCode() . ') ' . $response->getBody()->__toString();
+            throw OAuthRestClientException::unableToLoadAccessToken($message);
         }
 
         $response = json_decode($response->getBody()->__toString(), true);
diff --git a/src/Rest/OAuthRestClientException.php b/src/Rest/OAuthRestClientException.php
index a535690..5cb305e 100644
--- a/src/Rest/OAuthRestClientException.php
+++ b/src/Rest/OAuthRestClientException.php
@@ -5,8 +5,14 @@
 
 class OAuthRestClientException extends Exception
 {
-    public static function unableToLoadAccessToken()
+    public static function unableToLoadAccessToken(?string $message = null)
     {
-        return new self('Unable to load access token');
+        $errorMessage = 'Unable to load access token';
+        
+        if ($message) {
+            $errorMessage . ': ' . $message;
+        }
+
+        return new self($errorMessage);
     }
 }