Build Infrastructure with Terraform on Google Cloud: Challenge Lab

[orion_moonstone]

I'm doing Task 1. Create the configuration files and Task 2. I have imported the infra and confirmed yes to apply where every step has been successful including importing the e2-micro instances.

The Check my Progress is not being applied and it's complaining that instances.tf has not been created.
My folder structure is this and in main.tf I have set the source path to "./modules/instances" for instances.

main.tf
variables.tf
modules/
└── instances
├── instances.tf
├── outputs.tf
└── variables.tf
└── storage
├── storage.tf
├── outputs.tf
└── variables.tf

Could I ask for some assistance in regards to the "Check my progress" to verify the objective bits under the Challenge Lab?