Kaltura_Client_Exception thrown

Invalid KS "ZTEzYzBjZmVkOTllMTc2ZDQ2YzI2N2Y2ZDliNjQ1OGRiZGQzNDMyOXwxMDE7OzE1MDA3OTIxMjk7MjsxNTAwNzA1NzI5LjYyO0Fub255bW91cztlZGl0Oio=", Error "-1,INVALID_STR"