Azure Bot Framework Echo Bot NullReferenceException

Question

I just created a new bot with bot framework V4 using the Bot Framework v4 SDK Templates for VS 2019. I created a new Echo bot based on .net core 3.1, when I run it and try to use it with the Emulator, I get an exception right away as this:

System.NullReferenceException: 'Object reference not set to an instance of an object.'

Any idea?

Detailed Stacktrace: https://gist.github.com/M365Devme/74e0aab0b4cbade9900835bd0cc6b097

This is the project I used:

Welcome to Stack Overflow. Please have a look at the handy guide to see the steps you can take to get a better answer faster: stackoverflow.com/help/how-to-ask — Kyle Delaney
I cannot reproduce your problem. Please edit the (correctly formatted) stack trace into your question. And can you link to the specific template you're using? — Kyle Delaney
@KyleDelaney I modified the question to include required information. I pasted a screenshot of the project, but what do you mean by a link to the template? I added it from the extensions in VS 2019. — M365 Dev
I meant a link to the Visual Studio marketplace, like this: marketplace.visualstudio.com/… — Kyle Delaney

Kyle Delaney Kyle Delaney · Accepted Answer · 2021-01-11T18:56:13

From this comment:

This is a known issue in 4.11 sdk. The exception is internally caught, and can be safely ignored. More information can be found here: https://github.com/microsoft/botbuilder-dotnet/issues/4867

Azure Bot Framework Echo Bot NullReferenceException

1 Answers