embedded metadata vs. web page

hi,
face to this webpage: https://www.ideals.illinois.edu/handle/2142/109251
my zotero (v. 5.0.96.4 on mac) is able to recognize it as "embedded metadata" and download the right data for the right type of object (a report);
the zotero of a friend (same version, on windows) fails to recognize the data in the pages ans resorts to downloading it as simple webpage.
any idea about the reason of this failed recognition?
thanks!
Maurizio
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