Kaltura_Client_Exception thrown

Invalid KS "OGRkNGMzYWI4M2VlMzljMTZlNGNhZjlhNjBmMjAyZTM4OGUzMzE0MXwxMDE7OzE0NzQ5ODYzMDk7MjsxNDc0ODk5OTA5LjM3NjtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"