Kaltura_Client_Exception thrown

Invalid KS "ZTdiZGQzNWUzZmRjYTgzNTdkNjNmZmViMjk1OWZlZDhlNmU0OGE0M3wxMDE7OzE0NzUxMTQ1NDg7MjsxNDc1MDI4MTQ4LjU2MztBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"