MSGraph Teams beta API发布新消息“未知错误”

Question

我正在通过此电话要求我的令牌

'https://login.microsoftonline.com/'+FTenantID+'/oauth2/v2.0/authorize?'+
          'client_id='+ClientID+
          '&response_type=code'+
          '&redirect_uri='+CallbackURL+
          '&response_mode=query'+
          '&scope=offline_access Group.ReadWrite.All'

在发布给/ beta / teams / Id / channels / id / messages的帖子中

"415: Error "{  "error": {    "code": "UnknownError",    "message": "",    "innerError": {      "request-id": "ed900e60-1bef-4c3e-bbb6-d29a587de943",      "date": "2020-01-19T15:50:52"    }  }}

我看不到我的错误。 ：-（