PHP app to get Office 365 data using Graph API and Client Credentials

We are developing PHP program to get Office 365 data, such as calendar.
Use Office 365 Home account.
Use Microsoft Graph API.
Use client credentials grant type.

We can get token, user profile, but can not get calendar.

https://docs.microsoft.com/en-us/graph/auth-v2-service 
Follow this document,
[1] Register app - OK
[2] Configure for Microsoft Graph - OK
Calendars.Read Application Read calendars in all mailboxes
Calendars.ReadWrite Application Read and write calendars in all mailboxes
User.Read.All Application Read all users' full profiles
User.ReadWrite.All Application Read and write all users' full profiles

[3] Get administrator consent - OK
[4] Get access token - OK
[5] Use access token to call Microsoft Graph
Get user - OK works well to get user profile
Get calendar - not working
{
  "error": {
    "code": "OrganizationFromTenantGuidNotFound",
    "message": "The tenant for tenant guid '<tenant-ID>' does not exist.",
    "innerError": {
      "request-id": "<request-id>",
      "date": "2019-09-20T20:15:31"
    }
  }
}