Screenshots

Version

To determine what version of Web Chat you are running, open your browser's development tools, and paste the following line of code into the console.

[].map.call(document.head.querySelectorAll('meta[name^="botframework-"]'), function (meta) { return meta.outerHTML; }).join('\n')

If you are using Web Chat outside of a browser, please specify your hosting environment. For example, React Native on iOS, Cordova on Android, SharePoint, PowerApps, etc.

Describe the bug

This line

should be window.postMessage (https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage)

Steps to reproduce

1. Setup this sample https://github.com/microsoft/BotFramework-WebChat/blob/270a1d41653c7253fbe87c8e881d04e5ce0cb365/samples/07.advanced-web-chat-apps/e.sso-on-behalf-of-authentication
2. See error

Expected behavior

Additional context

[Bug]