Google Calendar API: writer access error when setting up Google calendar event create on Google business account

I’m using the Google Calendar API in my Angular 9 Web Application and trying to create events on a Google Calendar within my G Suite domain

In the G Suite Admin Console, I’ve given the service account permissions for the scopes https://www.googleapis.com/auth/calendar and https://www.googleapis.com/auth/calendar.events

I created the calendar itself under my account and have added the service account with "Make changes to events" permissions

NOTE: I tried the normal gmail account. It is working. But when I try the google business account, I have above problem(Like writer access error when setting up Google calendar event create).

Please find below Screen Shot.

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Source: Angular Questions