Kaltura_Client_Exception thrown

Invalid KS "NTdjOWQ2ZDYwOGMzYjBmZjY1NjEzNDdlYzgyZTUyZjEwMjc1NzUwNXwxMDE7OzE0OTM0NTM2MTA7MjsxNDkzMzY3MjEwLjk1NDU7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"