Update

lib/nulla_web/controllers/inbox_controller.ex

@@ -11,7 +11,7 @@ defmodule NullaWeb.InboxController do
         conn,
         %{"id" => follow_id, "type" => "Follow", "actor" => actor_uri, "object" => target_uri}
       ) do
-    with {:ok, local_actor} <- Utils.resolve_local_actor(target_uri),
+    with local_actor <- Actor.get_actor(ap_id: target_uri),
          {:ok, remote_actor_json} <- Utils.fetch_remote_actor(actor_uri),
          :ok <- HTTPSignature.verify(conn, remote_actor_json),
          remote_actor <-
@@ -31,7 +31,7 @@ defmodule NullaWeb.InboxController do
          accept_activity <-
            Activity.create_activity(%{
              type: "Accept",
-             actor: local_actor.id,
+             actor: local_actor.ap_id,
              object: follow_activity
            }),
          _ <-