Kaltura_Client_Exception thrown

Invalid KS "NzAyMDkxYWVlNDNiNWY4MDMwOWM4MzM1ODExMDdkOTlkYWJlZmI2OHwxMDE7OzE0OTU4NzE5NjE7MjsxNDk1Nzg1NTYxLjM2MztBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"