Terraform error: List of string required

│ Error: Invalid value for module argument
│
│   on main.tf line 8, in module "yourModuleName":
│    8:   subnet_ids = var..subnet_id
│
│ The given value is not suitable for child module variable "subnet_ids" defined at
│ ../path/to/your/terraformodule.tf :79,1-22: list of string required.

• Solution: if your element if from type list make user provide values using proper format: [value1, value2] or [value1] if your list of strings only have one value.

variable "vpc_security_group_ids" { default = ["sg-9038b461666bf999a"] }

See also

• terraform plan: [ -refresh-only | -lock=false | -target | -var-file | will be created | --help], Terraform plan errors, Terraform plan examples, Terraform plan execution errors, (known after apply)