I'm not able to create a hangouts link or google meet link through google calendar API

A few days ago , it was working the "Automatically add Google Meet to my calendar events".
Suddenly, It has not worked in Google Calendar API and the "getHangoutLink()" returns "null".

How can I fix it? Help me with some codes.

Thanks in advance.

Use the following code.

Event event = new Event()
.setSummary(title)
.setLocation(location)
.setDescription(description);
DateTime startDateTime = new DateTime( date +"T"+startTime+"+06:00" );//"2020-05-05T11:00:00+06:00");
EventDateTime start = new EventDateTime()
.setDateTime(startDateTime)
.setTimeZone("Asia/Dhaka");
event.setStart(start);
DateTime endDateTime = new DateTime(date +"T"+endTime+"+06:00");//"2020-05-05T12:00:00+06:00");
EventDateTime end = new EventDateTime()
.setDateTime(endDateTime)
.setTimeZone("Asia/Dhaka");
event.setEnd(end);
String[] recurrence = new String[] {"RRULE:FREQ=DAILY;COUNT=1"};
event.setRecurrence(Arrays.asList(recurrence));

/* s1 = "abc@gmail.com";
s2 = "xyz@gmail.com";

EventAttendee[] attendees = new EventAttendee[] {
new EventAttendee().setEmail(s1),
new EventAttendee().setEmail(s2),
};*/
EventAttendee attendees[];
attendees = new EventAttendee[allAttendees.size()];
for(int i=0; i<allAttendees.size(); i++){
// System.out.println(allAttendees.get(i));
attendees[i] = new EventAttendee().setEmail(allAttendees.get(i));
}
event.setAttendees(Arrays.asList(attendees));
EventReminder[] reminderOverrides = new EventReminder[] {
new EventReminder().setMethod("email").setMinutes(24 * 60),
new EventReminder().setMethod("popup").setMinutes(10),
};
Event.Reminders reminders = new Event.Reminders()
.setUseDefault(false)
.setOverrides(Arrays.asList(reminderOverrides));
event.setReminders(reminders);
ConferenceSolutionKey conferenceSKey = new ConferenceSolutionKey();
conferenceSKey.setType("hangoutsMeet"); // Non-G suite user
CreateConferenceRequest createConferenceReq = new CreateConferenceRequest();
createConferenceReq.setRequestId("3whatisup3"); // ID generated by you
createConferenceReq.setConferenceSolutionKey(conferenceSKey);
ConferenceData conferenceData = new ConferenceData();
conferenceData.setCreateRequest(createConferenceReq);
event.setConferenceData(conferenceData);
String calendarId = "primary";
try {
event = service.events().insert(calendarId, event).setConferenceDataVersion(1).execute();
} catch (IOException e) {
e.printStackTrace();
}
System.out.printf("Event created: %s\n", event.getHtmlLink());
System.out.printf("Hangout Link %s\n", event.getHangoutLink());