Having a problem setting up or using Zotero? One of these troubleshooting tips may solve your problem! If not, feel free to contact a librarian for help.
SOLUTION: Microsoft Word may have been open during installation of the Zotero Word plugin. Save your documents and quit Word. Now, reopen Word. Your Zotero toolbar should appear. If not, try reinstalling the Zotero Word plugin with Microsoft Word closed, then reopen Word.
SOLUTION: In Office for Mac 2011, Zotero’s Word toolbar may be seen as a floating toolbar. To reopen the Zotero toolbar, select View from the top horizontal toolbar in Word. Then, choose Toolbars → Zotero Bibliographic Management. You should once again see your Zotero floating toolbar.
SOLUTION: Zotero's browser connectors sometimes experience problems grabbing data from a particular database. These problems are usually resolved fairly quickly, but in those instances, there are reliable temporary workarounds. First, see if the item is available in a different database (for example, Google Scholar), or see if the database works in a different browser. Alternatively, instead of grabbing your citations using the browser connector, look for a way to download your citation as an RIS file, which can then be uploaded to your Zotero client.
As an example, here is how to download an RIS file from JSTOR: