Directline client fails to start a conversation for the new Language Services bot

[s2chandoUW]

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Version

Microsoft.Bot.Connector.DirectLine 3.0.3-Preview1

Describe the bug

I have created a new language services resource, a custom question answer library in it and then connected it to a bot.
see: https://techcommunity.microsoft.com/t5/ai-cognitive-services-blog/question-answering-feature-is-generally-available/ba-p/2899497
Then I enabled direct channel on the bot resource. grabbed the key and then plugged it in my existing solution. Note, the existing solution works fine if I connect to a bot (what microsoft now calls classic).

To Reproduce

Steps to reproduce the behavior:

1. Go to your bot, enable direct channel and grab the key
2. Go to the console program and plugin the key
3. run program
4. See error

Expected behavior

bot message should be received

[bug]