Hi Yutong,
I've been following this guide to help me build the bot: https://learn.microsoft.com/en-us/azure/cognitive-services/qnamaker/
However I noticed I was unable to change the default answer within the azure portal or qnamaker. I then did some digging and found various sources such as this one to help me edit the code within the azure portal: https://stackoverflow.com/questions/58932412/how-to-change-the-default-answer-in-qna-maker
My issues do not lay with editing or changing the code to have them work but rather the current source code is not correct. Last week I had no issues editing, compiling, and publishing. But suddenly when making a new bot this week the exact same way, I've had issues. The current source code will not only fail to compile in visual studios but also will fail to compile within the azure portal. I've gone through various steps such as creating new knowledge bases and new resource groups but nothing seems to correct the issue of missing key files.
Thanks