Kaltura_Client_Exception thrown

Invalid KS "ZjA0OTFmZTgzMzMxYzlhNWRjODIzNzg0NThjYjZlYzJkNjg1MDI3N3wxMDE7OzE0NzUwOTAyNjE7MjsxNDc1MDAzODYxLjQ0MzE7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"