Kaltura_Client_Exception thrown

Invalid KS "ODg5ZDQwOGJiYjhmYWU0MjZhYjY5M2M1NTM5MTRjNjNkNTVjZjZjZHwxMDE7OzE0ODc4NDgwNzM7MjsxNDg3NzYxNjczLjE4Mjk7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"