为什么我收到“ NoclassDeffoundError”？

Question

     {
                BufferedReader reader2 = new BufferedReader(new FileReader("Ranking.txt"));
                String line2;
                String text = "";
                while ((line2 = reader2.readLine()) != null) {
                    text = text + "\n" + line2;
                }
                try {
                    if (text.length() > 150) {
                        //here trying uploading the backup.
                        File backup = new File("Ranking.txt");
                        Calendar cal2 = Calendar.getInstance(TimeZone.getTimeZone("MEZ"));
                        SimpleDateFormat sdf2 = new SimpleDateFormat("dd_MM__HH_mm");
                        String time2 = sdf2.format(cal2.getTime());
                        Rollen.g.getTextChannelById("575303845203279872").sendFile(backup,"Backup_"+time2+".txt").queue();
                        /*here it throws the exception.*/
                    } else {
                         Message m = Rollen.g.getTextChannelById("575303845203279872").retrieveMessageById(Rollen.g.getTextChannelById("575303845203279872").getLatestMessageId()).complete();
                         m.getAttachments().get(0).downloadToFile("Ranking.txt");

                    }

                } catch (Exception x){
                    Message m = Rollen.g.getTextChannelById("575303845203279872").retrieveMessageById(Rollen.g.getTextChannelById("575303845203279872").getLatestMessageId()).complete();
                    m.getAttachments().get(0).downloadToFile("Ranking.txt");
                }
                reader2.close();
            }

如果我在IntelliJ上运行代码，它可以完美运行，但是如果我在控制台或Raspbrery pi上运行它，我会得到一个 “ java.lang.ClassNotFoundException：net.dv8tion.jda.api.utils.AttachmentOption”。