This is from the Zotero Word processor plug-in documentation: https://www.zotero.org/support/word_processor_plugin_troubleshooting
If the Zotero tab or toolbar (or Zotero scripts menu for Word 2008/2011 for Mac) does not appear, follow these steps:
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Close Word or LibreOffice.
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In Zotero, go to Tools → Add-ons → Extensions.
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Make sure “Zotero Word for Mac”, Zotero for Windows Integration“, and/or “Zotero LibreOffice Integration” are enabled. If any are not, click the “Enable” button.
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If the “Enable” button is grayed out and you are unable to click it, click the “Remove” button and restart Zotero.
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If you don't see the required integration plugin in the Extensions pane at all, then you should
re-download and re-install Zotero. It is not necessary to uninstall Zotero before re-installing; simply install Zotero over the top of the existing installation. (
Note: Re-installing Zotero rarely fixes problems and should not be used as a general troubleshooting step. This is one of the few instances where re-installation is helpful.)
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In the
Cite pane of Zotero preferences, open the “Word Processors” tab.
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Click “Reinstall LibreOffice/Microsoft Word Add-in” and then restart your word processor.
If you are still experiencing issues, follow these software specific troubleshooting steps:
Debugging broken documents
Field codes instead of citation/bibiliography text
Citations/bibliography highlighted
Citations converted to plain text