Dokiwiki-plugin-odt installation

[azimut2000]

Hello...

I was thinking it could be simple to use this plugin, but not !
I'm on Dokuwiki 2018-04-22a "Greebo" version and i use last version of this plugin.

When I try to use the function to transform a wiki page into an ODT page, nothing happens and the LOG of my Apache server says "PHP Warning: trim() expects parameter 1 to be string, object given in /var/www/html/wiki/lib/plugins/odt/ODT/css/cssimportnew.php on line 784" : I tried to fix it, but my PHP knowledge is quite limited and I don't see how to solve my problem.

So, I wonder if there would be some prerequisites to respect? I'm with an Apache 2.4, PHP 7.4 on a Centos 7... nothing spectacular or too old. There are PHP LIBs to generate ODT files, so I think it is not necessary to install LibreOffice to have a conversion to ODT (contrary to the PDF export for this plugin).

So why does it refuse to work?

Thanks for your help,

Thierry