Status: 400
Response:
{
"error": {
"message": "Invalid appsecret_proof provided in the API argument",
"code": 100,
"type": "GraphMethodException",
"fbtrace_id": "CasJYZEZfik"
}
}

解决：

访问口令配置错误：Facebook获取口令https://developers.facebook.com/tools/debug/accesstoken?q=EAAGZAdmHCm00BACy86GlCbwdhE8GZCyePwVpZCUCdV6NM57ZCspx6bcKdCc0em9ZB6tG4mXnZCpZAZBErFZBkxBE9TR4xLyz2gp4YNo2hkP8As6BpLL2zRKQPeD8VgccaQPiksrs5Oq7wrQgq26STQdCmvkMF3cySwF9ZBHk8yzMRZBSiUFUDfpxXjqrKhit5cI0pEZD

谷歌找的答案如下：

https://*.com/questions/18683421/why-do-i-get-invalid-appsecret-proof-provided-in-the-api-argument