Kaltura_Client_Exception thrown

Invalid KS "NzQ0OWExN2QwMTUxYWEwMjgxMWE4NGIyZDM0OTdhMzgzYTFjNTA4NHwxMDE7OzE0NzUyMjY1ODY7MjsxNDc1MTQwMTg2LjYyNDtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"