Using terraform to create bucket - error

When I run the terraform script below, the following error is throw during apply:

The bucket does get created but no policy is added (I have not included the actual bucket name which obviously is in the script).

Any ideas?

provider "aws" {
  region = "eu-west-1"
}

resource "aws_s3_bucket" "bucket" {
  bucket = "MYBUCKET"
}

resource "aws_s3_bucket_public_access_block" "public_access_block" {
  bucket = aws_s3_bucket.bucket.id

  block_public_acls       = false
  block_public_policy     = false
  ignore_public_acls      = false
  restrict_public_buckets = false
}


resource "aws_s3_bucket_website_configuration" "website" {
  bucket = aws_s3_bucket.bucket.bucket

  index_document {
    suffix = "index.html"
  }

  error_document {
    key = "error.html"
  }
}

resource "aws_s3_bucket_policy" "bucket_policy" {
  bucket = aws_s3_bucket.bucket.id

  policy = <<POLICY
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": "*",
      "Action": "s3:GetObject",
      "Resource": "arn:aws:s3:::MYBUCKET/*"
    }
  ]
}
POLICY
}