Socket hand up error in Google's Calendar API when inserting new events

Question

I'm using googleapis (NodeJS) with AWS lambda functions that create calendar invitations on behalf of users.

1. Get the available timeslots using google.calendar.freebusy.query()
2. Creates the invitation using google.calendar.events.insert()

Step 1 works just fine. But recently, step 2 started throwing this error:

FetchError: request to https://www.googleapis.com/calendar/v3/calendars/primary/events?sendUpdates=all failed, reason: socket hang up

The error happens only when deployed to AWS. It works fine locally using serverless-offline. Also, if I try 10 times, about 1 - 2 of them create the invitation and the rest fails. When it fails, it takes about 5-8 minutes to display the error.

Any guide on this would be much appreciated.

Server env:

• Node v14.17.2
• googleapis 95.0.0 (Tried downgrading to 89, 76 & 59 and that doesn't work)
• serverless v1.83.3

Creating invitations:

await googleCalendar.events.insert(
    {
      sendUpdates: "all",
      calendarId: "primary",
      resource: newEvent,
    },
    (err, res) => {
      if (err) {
        console.log('Failed to send the invitation', error)
        // this is where I'm catching the above error
      }
    }
  );