Error running Events spec

[dombarnes]

I have written an events spec in my project, similar to the ones in this projects, and when I run it I get the following error

Failure/Error: Team.create!(team)

     NoMethodError:
       undefined method `empty?' for #<Team _id: 65847bcb7fc2383892cb5523, created_at: 2023-12-21 17:54:19.206309 UTC, updated_at: 2023-12-21 17:54:19.206309 UTC, team_id: "T0", name: "minus", domain: nil, token: "abc-0", oauth_scope: nil, oauth_version: "v1", active: true, bot_user_id: nil, activated_user_id: nil, activated_user_access_token: nil>
# /Users/domster83/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/mongoid-8.1.4/lib/mongoid/attributes/processing.rb:20:in `process_attributes'
     # /Users/domster83/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/mongoid-8.1.4/lib/mongoid/document.rb:233:in `block in construct_document'
     # /Users/domster83/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/mongoid-8.1.4/lib/mongoid/threaded/lifecycle.rb:80:in `_building'
     # /Users/domster83/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/mongoid-8.1.4/lib/mongoid/document.rb:228:in `construct_document'
     # /Users/domster83/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/mongoid-8.1.4/lib/mongoid/document.rb:104:in `initialize'
     # /Users/domster83/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/mongoid-8.1.4/lib/mongoid/persistable/creatable.rb:172:in `new'
     # /Users/domster83/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/mongoid-8.1.4/lib/mongoid/persistable/creatable.rb:172:in `block in create!'
     # /Users/domster83/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/mongoid-8.1.4/lib/mongoid/threaded/lifecycle.rb:142:in `_creating'
     # /Users/domster83/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/mongoid-8.1.4/lib/mongoid/persistable/creatable.rb:168:in `create!'
     # ./spec/events/events_link_shared_spec.rb:51:in `block (4 levels) in <main>'

And my spec

# frozen_string_literal: true

require 'spec_helper'

RSpec.describe 'events/link_shared' do
  include Rack::Test::Methods

  def app
    SlackRubyBotServer::Api::Middleware.instance
  end

  context 'without signature checks' do
    before do
      allow_any_instance_of(Slack::Events::Request).to receive(:verify!)
    end

    let!(:team) { Fabricate(:team) }

    let(:event) do
      {
        token: SecureRandom.hex,
        team_id: 'team_id',
        api_app_id: 'AAAA',
        event: {
          type: 'link_shared',
          user: 'user_id',
          channel: 'C1',
          message_ts: '1547842100.001400',
          links: [{
            url: "https://example.com",
            domain: 'example.com
          }]
        },
        type: 'event_callback',
        event_id: 'EvFGTNRKLG',
        event_time: 1_547_842_101,
        authed_users: ['AAAA']
      }
    end

    let(:user) do
      { user: { name: 'Bob' } }
    end

    let(:channel) do
      { channel: { name: 'random' } }
    end

    context 'with a named event handler' do
      before do
        Team.create!(team)
      end

      it 'posts System Data blocks' do
        system_blocks = get_blocks(event[:event][:links][0][:url])
        # expect_any_instance_of(Slack::Web::Client).to receive(:chat_postMessage).with(
        #   channel: 'channel_id', text: 'Welcome Bob to random!'
        # )
        post '/api/slack/event', event
        expect(last_response.status).to eq 201
        expect(JSON.parse(last_response.body)).to eq(system_blocks.to_slack_blocks.to_json)
      end
    end
  end
end

Any help appreciated