libreoffice writer zotero plugin Could not create Java implementation loader linux

[Gigiux]

Hello,

I have just installed Firefox 61.0.2 and zotero 5 on Linux Ubuntu 18.04. I am trying to install the plugin for LO writer.

By running ZOTERO: PREFERENCES>CITE>WORD RPOCESSOR>REINSTALL LIBREOFFICE PLUGIN no action is activated.

From LO TOOLS>EXTENSION MANAGER>ADD, if I locate /opt/zotero I don’t have access to the oxt file. I then copied the Zotero_OpenOffice_Integration.oxt in ~/Zotero but when launched, I get the error Could not create Java implementation loader.
How can I install the plugin?

Thank you

[jbfaure]

Is your Zotero installation up to date? Current Zotero version is 5.0.54

[johnnycomelately]

My Zotero is 5.0.87, LO 6.4.3.2 (snap) on Ubuntu 18.04. I also have this problem. Even after I have installed all the java stuff I can find, I still cannot get it to work.