Zotero Connector: “Is Zotero Running?”

When you click the Save to Zotero button in your browser or try to use Zotero with Google Docs, you may receive the following message:

“The Zotero Connector was unable to communicate with the Zotero desktop application.”

The Zotero Connector needs to connect to the Zotero desktop app in order to save data or insert citations into Google Docs. (It can also save pages directly to zotero.org, but saving to the Zotero application provides the best experience.)

First, make sure that Zotero is installed and open on your computer. If you don't yet have the Zotero application, you can install it from the downloads page. If you were previously using Zotero for Firefox, note that Zotero now runs only as a standalone application.

Next, restart your browser and try again.

After restarting, if Zotero is open but the Zotero Connector still reports that Zotero is unavailable, something on your computer is preventing the Connector from talking to Zotero. You can determine whether the problem is within the browser or a system-wide problem by loading http://127.0.0.1:23119/connector/ping in one or more browsers while Zotero is open. Under normal circumstances, it should display “Zotero Connector Server is Available” (or “Endpoint does not support method” in older versions).

  • If you're able to load that URL but the Zotero Connector shows Zotero as unavailable, try these steps until the problem is resolved:
    1. Uninstall and reinstall the Zotero Connector.
    2. Temporarily disable any browser extensions that may block network requests, such as AdBlock, uBlock Origin, NoScript, EFF Privacy Badger, or Request Policy. If the Connector stops saying that Zotero is offline, reenable each extension one at a time and, if the problem recurs, whitelist 127.0.0.1 port 23119 in the extension's settings.
    3. Temporarily disable any other installed extension.
    4. Try in another browser.
    5. Create a new profile in your original browser. If this fixes the problem, something is wrong with your original profile, and you'll need to either identify the problem or transfer your bookmarks, history and other data to the new profile.
  • If you can't load the URL in one browser but you can in another browser, try these steps in the original browser until the URL works:
    1. If your computer is connecting via a proxy server, ensure that the host 127.0.0.1 (an alias for your computer itself) is excluded from proxying in either the browser or system proxy settings.
    2. Temporarily disable any browser extensions that may block network requests, such as AdBlock, uBlock Origin, NoScript, EFF Privacy Badger, or Request Policy. If the URL starts working, reenable each extension one at a time and, if the problem recurs, whitelist 127.0.0.1 port 23119 in the extension's settings.
    3. Temporarily disable any other installed extension.
  • If you can't load the URL in any browser, try these steps until the URL works:
    1. If your computer is connecting via a proxy server, ensure that the host 127.0.0.1 (an alias for your computer itself) is excluded from proxying.
    2. Restart your computer.
    3. Remporarily disable any security software running on your system. If the URL starts working, reenable each piece of software one at a time and, if the problem recurs, whitelist 127.0.0.1 port 23119 in the software's settings.
kb/connector_zotero_unavailable.txt · Last modified: 2021/05/15 17:21 by dstillman