Error: Invalid for_each argument

  on ../../../modules/project_services/main.tf line 80, in resource "google_project_iam_member" "project_service_identity_roles":
  80:   for_each = {
  81:     for k, v in local.add_service_roles : k => v if v.email != null
  82:   }
    ├────────────────
    │ local.add_service_roles is object with 2 attributes

The "for_each" map includes keys derived from resource attributes that cannot
be determined until apply, and so Terraform cannot determine the full set of
keys that will identify the instances of this resource.