Kaltura_Client_Exception thrown

Invalid KS "NzE5YzU3OTY3ZmEyOWM1MDBjYzM2M2Q4ZWNmZWMxZTFkY2Q2MWQzMnwxMDE7OzE0NzU0MDQ1NDA7MjsxNDc1MzE4MTQwLjI0MjtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"