I have been trying to fetch all unread notifications from StackExchange API. However, I always get a blank items data in the response.

API Endpoint:

/2.3/me/notifications/unread?page=1&pagesize=10&site=stackoverflow

JSON received:

{
  "items": [],
  "has_more": false,
  "quota_max": 10000,
  "quota_remaining": 9975
}

I do have an unread notification as in the below screenshot:

I experience the same behavior when I deliberately make a notification unread.

I am referring to this API doc.