无效清单：未知字段：[addOns.enableHttpEndpoints]

如何解决无效清单：未知字段：[addOns.enableHttpEndpoints]

我正在尝试使用 google 工作区备用运行时，这需要清单中的键 enableHttpEndpoints 才能在尝试使用该键保存时使用它给我错误。

以下是我的清单：

{
  "timeZone": "America/New_York","dependencies": {
  },"exceptionLogging": "STACKDRIVER","oauthScopes": ["https://www.googleapis.com/auth/gmail.addons.execute","https://www.googleapis.com/auth/gmail.Metadata"],"runtimeVersion": "V8","addOns": {
    "enableHttpEndpoints": true,"common": {
      "name": "My HTTP Add-on","logoUrl": "https://fonts.gstatic.com/s/i/googlematerialicons/markunread_mailBox/v6/black-24dp/1x/gm_markunread_mailBox_black_24dp.png","homepageTrigger": {
        "runFunction": "https://us-central1-test-http-runtime.cloudfunctions.net/HttpAddOn/exampleWidgets"
      }
    },"gmail": {
      
      "contextualTriggers": [{
        "unconditional": {
        },"onTriggerFunction": "https://us-central1-test-http-runtime.cloudfunctions.net/GmailExample/simpleMessageInfo"
      }]
    }
  }
}

以及它给出的错误：

无效清单：未知字段：[addOns.enableHttpEndpoints]