Describe the bug
A clear and concise description of what the bug is.i have followed the read me file and changed it to use OpenAI in the appsettings.json the key is set but when i launch using yarn start in the copilot when i write in generates that error

To Reproduce
Steps to reproduce the behavior:

1. Go to semantic-kernel/samples/apps/copilot-chat-app/webapi
2. write dotnet user-secrets set "AIService:Key" "MY_AZUREOPENAI_OR_OPENAI_KEY"
3. continue with the read me steps when it launches write something
4. See error

Expected behavior
it is supposed to generate a response

Desktop

• OS: windows 11
• IDE: Visual Studio, VS Code
• NuGet Package Version 0.1.0