Inappropriate value for attribute "subnets": element 0: string required.

[jester-vergara]

$ terraform version
Terraform v0.12.6

• provider.aws v2.24.0
  jvergara@DESKTOP-6TT1CHF:~/ethos$

Error: Incorrect attribute value type

  on load_balancers.tf line 3, in resource "aws_elb" "terraform-blue-green":
   3:   subnets         = ["${aws_subnet.terraform-blue-green.*.id}"]

Inappropriate value for attribute "subnets": element 0: string required.

[jester-vergara]

@sonianara You can always unwrap value between [ and ] to make it like this:

subnet_ids = "${aws_subnet.priv_subnet.*.id}"

terraform-aws-modules/terraform-aws-vpc#271