Messaging extension bot example getting 501 Error

Versions

botbuilder version: 4.9.0 nodejs version: 14.0.5 os: mac

Describe the bug

I am trying to create a messaging extension action command feature with the following tutorial: https://docs.microsoft.com/en-us/microsoftteams/platform/task-modules-and-cards/task-modules/task-modules-bots

However, I am keep getting the following bug when invoking from Microsoft teams

(node:65410) UnhandledPromiseRejectionWarning: Error: BotFrameworkAdapter.processActivity(): 501 ERROR
    at BotFrameworkAdapter.<anonymous> (/Users/kevin/Desktop/Github/jibee/node_modules/botbuilder/lib/botFrameworkAdapter.js:677:27)
    at Generator.next (<anonymous>)
    at fulfilled (/Users/kevin/Desktop/Github/jibee/node_modules/botbuilder/lib/botFrameworkAdapter.js:11:58)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
(Use `node --trace-warnings ...` to show where the warning was created)

The code example I am using bot.js

import { BotFrameworkAdapter } from 'botbuilder';
import { TeamsMessagingExtensionsActionBot } from './teamsMessagingExtensionsActionBot';

const taskModuleController = new BotFrameworkAdapter({
    appId: process.env.APP_ID,
    appPassword: process.env.APP_PASSWORD
});

const bot = new TeamsMessagingExtensionsActionBot();

controller.webserver.post('/task_endpoint/', (req, res) => {
    taskModuleController.processActivity(req, res, async (context) => {
        console.log(context);
        await bot.run(context);
    });
});

teamsMessagingExtensionsActionBot.js

const { TeamsActivityHandler, CardFactory } = require('botbuilder');

export class TeamsMessagingExtensionsActionBot extends TeamsActivityHandler {
    handleTeamsMessagingExtensionSubmitAction(context, action) {
        return {
          task: {
            type: 'continue',
            value: {
              width: 500,
              height: 450,
              title: 'Task Module Fetch Example',
              url: 'https://contoso.com/msteams/taskmodules/newcustomer',
              fallbackUrl: 'https://contoso.com/msteams/taskmodules/newcustomer'
            }
          }
        };
    }
}

[bug]

[kevinyang372]

I realized there was an error in my manifest where I misdefined the dynamic parameters input to be static which caused the resource error. Thank you for all the help!

[mdrichardson]

I see almost no conversations on that bot in the last 6 days except for two 404 errors.

1. Was ngrok still running?
2. Can you provide timestamps for the error?
3. How is the bot being installed in Teams?
4. Your manifest lacks the createCard and shareMessage commands, so that may cause an issue with using the sample code in your bot.
5. That the handleTeamsMessagingExtensionSubmitAction isn’t even being reached, it leads me to believe something is off with your code. Can you get sample 51 to work, but itself? If so, there’s an issue with your code and you’ll need to link me to it so I can help debug it.