heroku – 尝试检索Google日历事件时,WEB_HOOK频道不可用

我正在尝试使用 Push notifications for Google Calendar

回调端点托管在Heroku上。 appname.herokuapp.com已在Search Console中进行验证，并已添加到Google控制台API&服务允许域列表。

请求

POST /calendar/v3/calendars/CALENDAR_ID/events/watch HTTP/1.1
Host: www.googleapis.com
Authorization: Bearer TOKEN
Content-Type: application/json
{
    "id":"1",
    "type": "web_hook",
    "address":"https://APPNAME.herokuapp.com/change"
}

响应

400 Bad Request
{
    "error": {
        "errors": [
            {
                "domain": "push",
                "reason": "channelUnknown",
                "message": "WEB_HOOK channel unavailable for: 
{address=https://APPNAME.herokuapp.com/change}"
            }
        ],
        "code": 400,
        "message": "WEB_HOOK channel unavailable for: {address=https://APPNAME.herokuapp.com/change}"
    }
}

什么

WEB_HOOK channel unavailable

错误的意思？

编辑：与顶级域名相同的结果，证书的主题与域名完全匹配。

这似乎是一个临时问题和 is now fixed according to Google.(我也测试过，现在似乎对我有用。)