suddenly not working on a major library website

Not sure what happened, but I've been using Zotero with no problems using this library catalog for the past six months (at University of Michigan). As of today I can't get any references to download. A somewhat random page, to try any of the following refs:

http://mirlyn.lib.umich.edu/F/FFRNKNHKLX4U8SFQAGBT8FJULVHAR755TUEGQPJ1T7PECY46D7-12087?func=find-acc&acc_sequence=013103482

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