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nullreferenceexception.net-core-3.1azure-bot-servicebotframework

Azure Bot Framework Echo Bot NullReferenceException

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:

Exception Image

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: enter image description here

Solution

  • 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