Zotero + LibreOffice (Linux/Ubuntu based distros) - Credits to Kameid

Trying to solve the problem where the Zotero plugin doesn't work properly in the Linux LibreOffice Writer:

Guide:

1. Uninstall Zotero

2. Make sure you have a Java Runtime Environment installed. In LibreOffice, go to Tools>Options>Advanced. Make sure you have the "Use Java runtime environment" box checked, and if there is a JRE installed. If there isn't one, open terminal and install the latest JRE:

sudo apt install openjdk-8-jre

3. Check if your installation worked. Run:

java -version

Output:

4. Restart LibreOffice

5. install libreoffice-java-common:

sudo apt install libreoffice-java-common

6. Install Zotero

It should work fine now:

Credits to Kameid

Zotero's post about the troubleshooting process for the word processor plugin.

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Bonus in case it didn't work

1. Navigate to the Zotero application files:

• Go to the directory where Zotero is installed and open extensions/zoteroOpenOfficeIntegration@zotero.org/install (Zotero 6) or integration/libreoffice (Zotero 7)
• For Flatpak: ~/.local/share/flatpak/app/org.zotero.Zotero/x86_64/stable/.../files/share/zotero/extensions/zoteroOpenOfficeIntegration@zotero.org/install
• Or search for Zotero_OpenOffice_Integration.oxt on your file manager (Nautilus, Dolphin...)

2. Double-click the Zotero_OpenOffice_Integration.oxt file to install it. Alternatively, go to Tools → Extension Manager in LibreOffice, click Add, and select the .oxt from the above folder.

Zotero's post