"error": {
 "errors": [
  {
   "domain": "calendar",
   "reason": "disallowedFieldMutation",
   "message": "Insufficient permissions to modify a field on the resource."
  }
 ],
 "code": 403,
 "message": "Insufficient permissions to modify a field on the resource."
}

Hello, I started receiving a calendar reminder which i cannot dismiss or delete. The event appears grayed out in the calendar but nothing happens when I press the delete button. The same issue occurs when i try to dismiss the reminder in the pop-up - pressing the button does nothing. I can't snooze or dismiss it. This error is logged in the debug console: Lightning: [calGoogleCalendar] Deleting item Gong Gaming OP call failed:2152334343: [object Object] Lightning: [calGoogleCalendar] Modifying item Gong Gaming OP call failed:2147500037: { "error": { "errors": [ { "domain": "calendar", "reason": "disallowedFieldMutation", "message": "Insufficient permissions to modify a field on the resource." } ], "code": 403, "message": "Insufficient permissions to modify a field on the resource." } } I am using a MacBook Pro (16-inch, 2019) MacOS Big Sur 11.4 (20F71) Thunderbird version - 78.11.0 Can someone please assist ? Best regards, Nikolai