I'm having a hard time importing information into Zotero. (I use Zotero stand alone on a Mac, if that makes any difference.) I have no idea what to do to remedy this. Any advice is appreciated. Here is my recent error information:

Steps to Reproduce:
1. Using Google Scholar, I wanted to import all articles that cited a specific article. I clicked the icon that allows me to import all of the information into Zotero.
2. I was asked to check the specific articles I wanted to select. I selected all and clicked "Okay."
3. The Zotero message on the screen said I had a known translator issue and nothing was imported.

This is the error I received most recently -

[JavaScript Error: "TypeError: attachment is undefined" {file: "chrome://zotfile/content/zotfile.js" line: 3466}]
Zotero.ZotFile.pdfOutline.getOutlineFromFiles@chrome://zotfile/content/zotfile.js:3466:13
@chrome://zotfile/content/pdfextract/toc.js:100:1

This error has appeared a handful of times too -

[JavaScript Error: "Unable to access cssRules property of https://cdn.colwiz.com/static/css/webpdf/button-web.css?v=17.03.06-2007-152 in wpdDOMSaver.processCSSRecursively()" {file: "chrome://zotero/content/webpagedump/domsaver.js" line: 655}]
wpdDOMSaver.processCSSRecursively@chrome://zotero/content/webpagedump/domsaver.js:655:4
wpdDOMSaver.saveDocumentCSS@chrome://zotero/content/webpagedump/domsaver.js:971:16
wpdDOMSaver.saveDocumentHTML@chrome://zotero/content/webpagedump/domsaver.js:1026:21
wpdDOMSaver.saveDocumentEx@chrome://zotero/content/webpagedump/domsaver.js:1071:16
wpdDOMSaver.saveHTMLDocument@chrome://zotero/content/webpagedump/domsaver.js:1085:11
importFromDocument@chrome://zotero/content/xpcom/attachments.js:625:5
Zotero.Attachments</importFromURL/nativeHandlerImport/browser<@chrome://zotero/content/xpcom/attachments.js:234:5
Zotero.HTTP</this.processDocuments/onLoad@chrome://zotero/content/xpcom/http.js:881:5