Kaltura_Client_Exception thrown

Invalid KS "YzA5Y2VlNmM4MmY0MTU1YzNkMDc4Y2ZhZmU3MzUxMTJiYjBiNWIzZXwxMDE7OzE0NzUyOTg3MTU7MjsxNDc1MjEyMzE1LjI0NTtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"