Kaltura_Client_Exception thrown

Invalid KS "MDk2NGNlMTQwZDQ4NDZlYTQ3OWNjMmI4Y2NkZTFhMDVjNzQ5NzFmYnwxMDE7OzE1MDA5OTM1MDk7MjsxNTAwOTA3MTA5LjAwOTtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"