The last google chrome updates does not connect over websockets on a secure https connection. You either have to deactivate websockets in /var/www/html/fop2/js/presence.js (available since fop 2.25 or higher), or you have to upgrade to fop 2.27 and be sure to set the ssl certificate configs in fop2.cfg.
Best regards,
Hi Nicolas, thanks for your suggestion. I've disabled websockets and everything works fine.
