refs #16994 [fid] use correct key to access error message

module/fid/src/Service/Client.php

@@ -706,7 +706,7 @@ class Client
     {
         $errorCode = $response->getStatusCode();
         $error = json_decode((string)$response->getBody(), true);
-        throw new ClientException($error['message'], $errorCode);
+        throw new ClientException($error['detail'], $errorCode);
     }
 
     /**