For whatever it is worth, this works fine for me in 5.0.21 and the current translators on both chrome and firefox.

You may need to look at debug output to figure out what's getting hung up for you.

But, more basically: do other sites work with the connector? Does the BibTeX import if you load it into Zotero Standalone manually?

I posted debug info (ID: D958642537) for clicking the 'import into bibtex' on the aes page I quoted above. Zotero was updated to 5.0.21. I still get just the 'importing into bibtex' message.
Paul

Regarding the question if bibtex import works:
- I usually copy the bib file contents to the clipboard and then import from clipboard in zotero. That works.
- When I import a bibfile through file->import... the item is imported but in a newly created collection. Is that normal?
Paul

But what's selected now? You shouldn't get this error for a normal collection.

Also, while we'll fix this, note that you can just click the Save to Zotero button on that page — there shouldn't be any need to use the BibTeX link, or certainly to copy/save BibTeX. What happens when you just click the button?

Does the same thing happen after you restart Zotero?

Not sure what "new feature" you're referring to — there's nothing particularly new here.

(Right, that blog post is from early July, and the feature has been available in the Chrome connector for longer. You also wouldn't have been prompted to upgrade, since we haven't prompted 4.0 users to upgrade yet — you would've had to have upgraded manually. It looks like this bug was introduced in 5.0.12 in mid-August.)

I was able to reproduce this. It looks like it happens in the library root or the special views, but not in a collection or subcollection — that's why I was asking exactly what you had selected when seeing this. There'll be a new 5.0 Beta version with a fix in a few minutes, and the fix will be included in 5.0.22 in a few days.

You generally don't want to use this feature when there's a save button, though. On this page, you'll get much better metadata, as well as a PDF and snapshot, if you use the save button. (Granted, Zotero is saving via embedded metadata on this site, and there's no particular reason that should be better than the BibTeX, but it is here. On a site with an actual translator, you'll almost certainly get better metadata from the save button.) For that search result page, it's true that this feature is helpful at the moment, because there's no translator for this site and there's not currently a great way for a site to offer embedded metadata for search results, but we're hoping to offer better options for sites to use.

I cannot import from Worldcat.org regardless where I am in Z5 (root, collection or subcollection makes no difference). Nothing happens, but the blank extra firefox tab is made. This is in 5.0.21.
Testing from bibliotek.dk can import if I am in a collection, but not just to my library.

I need to think in a new way if I can't use my library as the incoming collection anylonger, but I guess this is a bug in me.

@Grode: As I say above, the error importing a RIS/BibTeX into non-collections is fixed for the next version. WorldCat's use of a new tab breaks our RIS/BibTeX interception (and I don't know off-hand if we can work around that), but there's no need to use it on WorldCat, where you can just use the normal Save to Zotero button.

Aha, new habit to me, but that is okay. I checked and that works.