Teams extension thrwoing UnhandledPromiseRejectionWarning Error: BotFrameworkAdapter.processActivity(): 501 ERROR - node.js

Question

I just got started with teams extensions. I modified the code provided by microsoft. My manifest:
...
"composeExtensions": [
{
"botId": "[BOT ID HERE]",
"canUpdateConfiguration": true,
"commands": [
{
"id": "createTimeDisplay",
"type": "action",
"title": "createTimeDisplay",
"description": "Creates a clock showing the given time in the users timezone.",
"initialRun": true,
"fetchTask": true,
"context": [
"commandBox",
"compose",
"message"
],
"parameters": [
{
"name": "param",
"title": "param",
"description": ""
}
],
"taskInfo": {
"title": "Create a new time display",
"width": "medium",
"height": "medium",
"url": "[SOME NGROK PATH HERE]/newTimeDisplay"
}
}
]
} ...
This is my index.js:
// Create bot handlers
const botActivityHandler = new BotActivityHandler();
const server = express();
const port = process.env.port || process.env.PORT || 3978;
server.post('/api/messages', (req, res) => {
console.log("Posted to api/messages/")
adapter.processActivity(req, res, async (context) => {
console.log("processing Activity")
// Process bot activity
await botActivityHandler.run(context);
});
});
server.get('/api/messages', (req, res) => {
console.log("Get to api/messages/")
});
server.listen(port, () =>
console.log(`\Bot/ME service listening at http://localhost:${port}`)
);
console .log("test")
// Listen for incoming requests.
And my botActivityHandler:
class BotActivityHandler extends TeamsActivityHandler {
constructor() {
super();
}
handleTeamsMessagingExtensionSubmitAction(context, action) {
switch (action.commandId) {
case 'createTimeDisplay':
return createTimeDisplay(context, action);
default:
//return createCardCommand(context, action);
console.log("Here")
throw new Error('NotImplemented');
}
}
handleTeamsAppBasedLinkQuery(context, query) {
console.log("look2")
const attachment = CardFactory.thumbnailCard('Thumbnail Card',
query.url,
['https://raw.githubusercontent.com/microsoft/botframework-sdk/master/icon.png']);
const result = {
attachmentLayout: 'list',
type: 'result',
attachments: [attachment]
};
const response = {
composeExtension: result
};
return response;
}
}
function createTimeDisplay(context, action) {
console.log("LOOK!!")
console.log(context)
const heroCard = CardFactory.heroCard("Test", "Me have text");
const attachment = { contentType: heroCard.contentType, content: heroCard.content, preview: heroCard };
return {
composeExtension: {
type: 'result',
attachmentLayout: 'list',
attachments: [
attachment
]
}
};
}
module.exports.BotActivityHandler = BotActivityHandler;
This code results in this error message in the console as soon as I click on the extension in a chat:
test
Bot/ME service listening at http://localhost:3978
Posted to api/messages/
processing Activity
(node:26072) UnhandledPromiseRejectionWarning: Error: BotFrameworkAdapter.processActivity(): 501 ERROR
at BotFrameworkAdapter.<anonymous> (E:\dev\gitgarden\teamsTestApp\What is that in my timezone\node_modules\botbuilder\lib\botFrameworkAdapter.js:741:27)
at Generator.next (<anonymous>)
at fulfilled (E:\dev\gitgarden\teamsTestApp\What is that in my timezone\node_modules\botbuilder\lib\botFrameworkAdapter.js:12:58)
at processTicksAndRejections (internal/process/task_queues.js:93:5)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:26072) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise
which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
(node:26072) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero
exit code.
I have no idea what's wrong. Any help/ideas appreciated.