Kaltura_Client_Exception thrown

Invalid KS "ODg5NDk5OGRhMTViYzFjNzhhYjc0ZWIxZjNkZmM2NjcxMGY4Y2I0YnwxMDE7OzE0NzU0MDQ0MDA7MjsxNDc1MzE4MDAwLjk0MTI7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"