Hello there,
One more thing we should try is please look at the URL endpoint (I know, obfuscated) is that it’s a raw URL, and doesn’t actually include the path to the messaging endpoint, which is traditionally at:
https://yourbotname.website.net/api/messages
That can be customized, but usually this is the default if they’ve used one of our templates or samples.
Gateway Timeout means the application took longer than 15s to respond (the bot did), that can happen if nothing is listening on that route (hence the URL problem), or something else. Please verify the URL an try again please.
Regards,
Yutong