问获取filesFolder API问题

EN

GET https://graph.microsoft.com/v1.0/teams/.../channels/.../filesFolder?$select=id,name,webUrl,parentReference HTTP/1.1
Content-Type: application/json
User-Agent: <...>
Authorization: Bearer ...
Host: graph.microsoft.com
Connection: Keep-Alive

HTTP/1.1 400 Bad Request
Cache-Control: private
Content-Type: application/json
request-id: ...
client-request-id: ...
x-ms-ags-diagnostic: {"ServerInfo":{"DataCenter":"West Europe","Slice":"SliceC","Ring":"5","ScaleUnit":"005","RoleInstance":"AGSFE_IN_67"}}
Strict-Transport-Security: max-age=31536000
Date: Mon, 01 Mar 2021 19:38:40 GMT
Content-Length: 310

{
  "error": {
    "code": "BadRequest",
    "message": "Value cannot be null.\r\nParameter name: token",
    "innerError": {
      "date": "2021-03-01T19:38:41",
      "request-id": "...",
      "client-request-id": "..."
    }
  }
}