The QR code to donate in that document has been changed to a LN invoice (which has expired).

According to https://archive.org, the QR code was originally set to bc1qc0h5ddd4ln4z05u55l87cp4umg8eg0jjkhcgvf according to

https://web.archive.org/web/20230311122357/https://raw.githubusercontent.com/MiPrimerBitcoin/Bitcoin-Diploma-English-Version/main/MiPrimerBitcoin_BitcoinDiploma_EnglishVersion_2023.pdf

What gives?