The Terraform configuration must be valid before initialization so that Terraform can determine which modules and providers need to be installed. Error: Error loading /builds/steamhaus/tf_mod_aws_rds/main.tf: Error reading config for aws_security_group[quicksight_rds]: Invalid dot index found: 'var.vpc.vpc_id'. Values in maps and lists can be referenced using square bracket indexing, like: 'var.mymap["key"]' or 'var.mylist[1]'. in: