Learned

The terraform module change I deployed seemed to have valid syntax, the module initialized properly with terraform init. The terraform plan created a valid plan, no errors or syntax issues were raised. When I started to execute the plan with terraform deploy it returned the following error:

Error: Error launching source instance: VPCIdNotSpecified: No default VPC for this user
        status code: 400, request id: xxx

This error pointed me towards a bug report on the Terraform github issues page, this stated: