Kaltura_Client_Exception thrown

Invalid KS "OWJjZjM3NzIzZGMwNWVkNTQ0YzZjMjllZmM1MjQ0NjI0MWE2YmJmZXwxMDE7OzE0OTMxMTM3NTI7MjsxNDkzMDI3MzUyLjcxNTtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"