Terraform input variable and nested maps

Terraform
1 
    variable "website" {
  description = "Map containing static web-site hosting or redirect configuration."
  default = {
    index_document = "index.html"
    error_document = "error.html"
    routing_rules  = <<EOF
    [{
        "Condition": {
            "KeyPrefixEquals": "img/"
        },
        "Redirect": {
            "ReplaceKeyPrefixWith": "images/"
        }
    }]
    EOF
    redirect_all_requests_to = {
      HostName = "www.example.com"
      Protocol = "http"
    }
  }
}

Getting this error

Error: Incorrect attribute value type

on .terraform/modules/s3/main.tf line 23, in resource “aws_s3_bucket” “a”:
23: redirect_all_requests_to = lookup(website.value, “redirect_all_requests_to”, null)

Inappropriate value for attribute “redirect_all_requests_to”: string required.

i am using this module