[xwiki-users] Livetable Excel Export issue

Hi, I have an issue with the Livetable Excel Export Plugin: [ http://extensions.xwiki.org/xwiki/bin/view/Extension/LiveTableExcelExport+M… ] I installed it throuth extension manager on a local test install (Demo ZIP Package) and on our production instance (CentOS 7.2/Java 8/Tomcat 8.0.33/MariaDB 5.5), both XWiki 7.4.4. Extension manager tells me the following: Excel Plugin 1.1 installed jxl 2.6.12 installed as dependency XWiki Livetable Excel Export Macro 1.8.2 installed Then I added the macro to the data page of an application livetable (ie Test App.Data). ``` #livetable('test app' $columns $columnsProperties $options) {{addExcelExportToLivetable livetable="test app" /}} {{/velocity}} ``` On the Demo instance I don't see the Excel export option at all, on the prod instance I see it but clicking it redirects me to a blank page with the text "Excel plugin is not installed". Any hints? Regards, Dennis