Kaltura_Client_Exception thrown

Invalid KS "ZTdiZjc3OWVjNzcwM2Q3MTIxMWRlNDVmMTk0NzhhZTA3YjVkMmUwN3wxMDE7OzE0NzUzNzk3OTU7MjsxNDc1MjkzMzk1LjcxMDI7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"