Access denied when linking to markdown file on s3

I have a application that includes release notes for deploying apps. I am storing the release note for an app on s3. I store the url to the release notes in the app class. When clicking on the link I get an access denied error. I've tried this with both secure: false and secure: true using the aws-sdk.

error

<Error>
  <Code>AccessDenied</Code>
  <Message>Access Denied</Message>
  <RequestId>...</RequestId>
  <HostId>...</HostId>
</Error>

.rake

begin
  notes = bucket.objects["_inbox/#{name}_RELEASE_NOTES.md"]
  notes.try do
    notes_path = File.join('ios', name, version,
                            build_string, "#{name}_RELEASE_NOTES.md")
    notes_url = notes.move_to(notes_path).public_url(secure: false).to_s
  end
rescue StandardError => e
  puts "No #{name}_RELEASE_NOTES.md found"
          puts e.messages
end

_full.html.erb

<li>
  <% if version.release_notes_url %>
   <%= link_to "Release Notes", version.release_notes_url %>
  <% else %>
    <%= "No Release Notes" %>
  <% end %>
</li>