Pragnesh Ambani — I’ve tested the code here on this site (“https://npm.runkit.com/botbuilder”) and it works just fine, I think the problem you are facing maybe because of some typos or dependencies being not installed correctly.

I suggest you look for any unnecessary comas or white spaces, Also make sure you uninstall botbuilder and reinstall it and if that still doesn’t work for you then make sure you share the full code that you wrote in your app.js file without credentials and I’ll try to trace the error. Thank you!

I’ve also found a problem similar to your’s, checkout this link it may help you fix your issue.
(“https://github.com/Microsoft/BotBuilder/issues/1888”)