ownCloud not running after update to Kralizec 1.0.21

I tried to reinstall openmediavault-owncloud, but have no luck.

root@mediavault:/var/log/nginx# netstat -npl | grep nginx
tcp6 0 0 :::80 :::* LISTEN 11563/nginx
tcp6 0 0 :::443 :::* LISTEN 11563/nginx

no nginx configuration is there:
root@mediavault:/var/log/nginx# ls /etc/nginx/sites-available/
default openmediavault-webgui

No ownCloud listening at 8443 (as set in the webinterface)

Thanks for your help. This did not fix it. A complete deletion of all owncloud files and a reinstallation fixed it.

Thanks.