Kaltura_Client_Exception thrown

Invalid KS "ODU1NjFiMWI1NjZmYmFmYzYwYTBmZDBiNDUwNDMwNWZlYzEwODUyZnwxMDE7OzE0NzUyNDk3MDE7MjsxNDc1MTYzMzAxLjk5NjM7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"