在AppFlow配置流程时，钉钉机器人接收信息时报错，远程请求失败，未知错误是什么原因？

在AppFlow配置流程时，钉钉机器人接收信息时报错
入参：
{
"Body": {
"conversationType": "2",
"contentKey": "content",
"cardTemplateId": "97a1e705-5421-4448-8471-3435fecc0406.schema",
"conversationId": "ciddQzx1vFIHdK/v4YeOJxFdA==",
"cardAtList": [
{
"nickName": "鲁先生",
"userId": "012153132839177496"
}
],
"type": "3",
"robotCode": "dingxf6s8bbfk0yyie03",
"userId": "012153132839177496",
"content": "西红市第十实验"
}
}
失败信息：
远程请求失败：Server Error
http response: {"requestid":"BA0F289F-E334-7BA6-9C9A-63EBB29D3935","code":"unknownError","message":"未知错误"}