Worldcat ISBN matching not working (LoC works fine)

edited March 17, 2020
188BET靠谱吗I have some books I would like to add to Zotero that appear in Worldcat but not Library of Congress.188BET靠谱吗My understanding is that Zotero is supposed to check against both databases, so this shouldn't be a problem.Here are a few examples:

http://www.worldcat.org/oclc/875896857
http://www.worldcat.org/oclc/922998795
http://www.worldcat.org/oclc/1107357409

188BET靠谱吗However, anytime I try to copy-paste any of the stated ISBNs from those pages into Zotero's lookup field, I'm told the entry can't be found.When I do the same thing with an entry from LoC, it works just fine.

188BET靠谱吗I'm on Ubuntu 19.10 using Zotero 5.0.84, both currently the latest released versions.
Sign Inor Registerto comment.