Creating or updating a stackit_cdn_distribution with redirect rules shows Internal error

[WolkenWechsel]

Description

Hello, when trying to create a CDN distribution with a bucket backend + redirect rules, we get an Internal Server error. Even when using the API, we were unable to get it working.

Steps to reproduce

resource "stackit_objectstorage_bucket" "my_bucket" {
  project_id = local.project_id
  name       = "a-sample-bucket-123"
}
resource "stackit_cdn_distribution" "my_cdn" {
  project_id = local.project_id

  config = {
    backend = {
      type       = "bucket"
      bucket_url = "https://a-sample-bucket-123.object.storage.eu01.onstackit.cloud"
      region     = local.region

      credentials = {
        access_key_id     = var.bucket_access_key
        secret_access_key = var.bucket_secret_key
      }
    }
    regions = ["EU"]

    redirects = {
      rules = [
        {
          description          = "test redirect"
          enabled              = true
          rule_match_condition = "ANY"
          status_code          = 302
          target_url           = "https://stackit.de/"
          matchers = [
            {
              values                = ["*/otherPath/"]
              value_match_condition = "ANY"
            }
          ]
        }
      ]
    }
  }
}

Creating the same distribution without redirect rules works as expected.

Actual behavior

Internal Server error on update and on create.

Expected behavior

Redirect rules should be created without error messages.

Environment

• OS: Ubuntu 24.04 LTS
• Terraform v1.15.8 on linux_amd64
• provider registry.terraform.io/stackitcloud/stackit v0.104.0

Additional information

We know this resource is in beta but the usecase of hosting a static website on StackIT Object Storage + CDN in front is currently not working for us.