Share Link feature of share files 0.3.3 won't work with Quota Bar 0.6 enabled (error: Cloud not found!)

[Marc083]

I can't get the share link feature of owncloud to work with quota bar 0.6 apps;
every time I will enable the quota bar 0.6 apps of my owncloud instance, all shared link become not accessible and i get this error:

"Cloud not found!"

Apache2 error.log,

Undefined index: size in /var/www/owncloud/apps/quotabar/appinfo/app.php on line 77, referer: http://owncloud-host.com/public.php?service=files&t=c2f760d452fadfee65c39a5d9cea8126

server config: Quota Bar 0.6 + OwnCloud 4.5.5 + Share Files 0.3.3 with Ubuntu 12.04