@Taehyung Welcome to Microsoft Q&A Forum, Thank you for posting your query here!
Firstly you need to check if your BOT works fine locally from BOT emulator.
The error message "The bot encountered an error or bug" usually indicates that there is a problem with the bot's code. The message "To continue to run this bot, please fix the bot source code" suggests that there is an issue with the code that needs to be resolved. You may want to check the code for any errors or bugs.
To troubleshoot exceptions in the Azure Bot Service follow **this article.
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You can also debug the issue by enabling diagnostic logging on your bot service from azure portal which can identify any configuration issues with the bot that is deployed. To enable the diagnostics logs for your Bot service as explained here.
Did you get a chance to check the app service that is created along with your bot resource is running?
Also, check if you app plan is using a standard tier instead of free. You can enable the diagnostic logging for your Azure App service as explained in this article and check for any errors.
Hope this helps. If you have any follow-up questions, please let me know. I would be happy to help.
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