I confirm the bug. doc and also fodt save as expected. Only odt does not work. This appears to have started with the upgrade to libreoffice 7.0.0 rc-2.1.
I started writer in safe mode and reset the entire user profile, but that made no difference. I completely removed and then reinstalled writer, but that made no difference. -- System Information: Debian Release: bullseye Architecture: i386 (i686) Thanks, Vincenzo Lomiento