I repeated the same action, saving the springer link above, and sent the following report. I guess the error you should look at will be the last "error" in the report because saving this link to Zotero was the last thing I did with Zotero before sending you this report ID.

Report ID: 1822762414

Thanks

But if you haven't yet moved your data directory back to your local disk, you'll need to do that before we can help you further here. You're getting tons of filesystem errors.

https://forums.zotero.org/discussion/comment/454845/#Comment_454845

That's a Debug ID from the Zotero Connector, not Zotero.

I linked to instructions in my first response to you.