How to create a like action?

I have a Reaction resource which is used to store likes and blocks in a social media context (a user can like an other user). I want to create a like action but get the following error. How can I fix this?

iex(12)> like = Animina.Accounts.Reaction 
|> Ash.Changeset.for_create(:like, %{sender_id: user2.id, receiver_id: stefan.id}) 
|> Animina.Accounts.Reaction.create!()
** (Protocol.UndefinedError) protocol Enumerable not implemented for #Ash.Changeset<action_type: :create, action: :like, attributes: %{sender_id: "207a829e-2464-42f7-8257-f4fa482fc7c2", receiver_id: "096da9ff-bcf7-49a1-8cba-f98413f37cab"}, relationships: %{},

The resource:

defmodule Animina.Accounts.Reaction do
  @moduledoc """
  This is the Reaction module which we use to manage likes, block, etc.
  """

  use Ash.Resource,
    data_layer: AshPostgres.DataLayer

  attributes do
    uuid_primary_key :id

    attribute :name, :atom do
      constraints one_of: [:like, :block]
      allow_nil? false
    end

    create_timestamp :created_at
  end

  relationships do
    belongs_to :sender, Animina.Accounts.User do
      allow_nil? false
      attribute_writable? true
    end

    belongs_to :receiver, Animina.Accounts.User do
      allow_nil? false
      attribute_writable? true
    end
  end

  actions do
    defaults [:create, :read, :destroy]

    create :like do
      accept [:sender_id, :receiver_id]
      change set_attribute(:name, :like)
    end
  end

  code_interface do
    define_for Animina.Accounts
    define :read
    define :create
    define :destroy
    define :by_id, get_by: [:id], action: :read
    define :by_sender_id, get_by: [:sender_id], action: :read
    define :by_receiver_id, get_by: [:receiver_id], action: :read
  end

  identities do
    identity :unique_reaction, [:sender_id, :receiver_id, :name]
  end

  postgres do
    table "reactions"
    repo Animina.Repo

    references do
      reference :sender, on_delete: :delete
      reference :receiver, on_delete: :delete
    end
  end
end