Terraform Labs - Level 1 - Create EBS Volume Using Terraform

I have completed my task successfully, but when I am completing it by clicking check it says - Resource not created using Terraform!.
I do not see any option to create it manually and output shows the volume being created, can someone suggest what should I do?

Ensure you have created the main.tf in /home/bob/terraform directory, and define the matching availability-zone (The question provides the region).

You can follow the configuration in the screenshot.