Terraform "unconfigurable attribute" on S3 buckets

[davegaeddert]

This appears to be a difference in the AWS provider v3 vs v4. Future versions will probably require v4, but for now the solution is to specify < 4.0.0 for the aws provider:

terraform {
  required_providers {
    aws = {
      version = "< 4.0.0"
      source = "hashicorp/aws"
    }
  }
}

provider "aws" {
  region     = var.aws_region
  ...
}