Office Viewer macro don't work with UTF8 encoded characters

Steps to reproduce

1. Configure XWiki instance with an Office Server (tested with LibreOffice 7.4.7.2)
2. Create a new page
3. Use Office Viewer macro to view pptx

{{office attachment="language_test.pptx"/}} 

Expected results

Actual results

Office Viewer macro don't work with UTF8 encoded characters.

But I converted pptx to jpg directly using libreoffice cmd configured on the server side, and it showed up fine

libreoffice --invisible --convert-to jpg 'language_test.pptx' --outdir /home/