Kaltura_Client_Exception thrown

Invalid KS "NjVjNmM4YzY1YWEwMzljOGE3NzQ5NTM5MDQ3MjQxZTBkZmViNmVlNXwxMDE7OzE0NzUxNjQyNDE7MjsxNDc1MDc3ODQxLjc5OTtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"