At the end of the page, there is a list of exhibits. The only exhibit marked as not being previously included is Exhibit 23.1 - Consent of Independent Registered Public Accounting Firm [1]

It's just a few lines from KPMG saying "We consent to the use of our report included herein and to the reference to our firm under the heading “Experts” in the prospectus"

I think someone just forgot to include that attachment, hence the amendment.

[1] https://www.sec.gov/Archives/edgar/data/1477333/000119312519...