@Danny Bui It is safe to ignore the message you are seeing. It is simply calling out the In-Portal Editing is not supported with the new programming model introduced.
As for your actual code itself, it would be best to check the following
- Ensure you have all the required app settings configured
- If you are using Managed Identity, ensure the same is set up for your Function App and required roles are assigned
- Check the logs for more detailed errors if any