Quantity on item page doesnt work

Hello

I ve got an issue on product item page.

If I add 1 item, everything works fine. But if I add more than 1, I got the an empty message with "!". After I click "ok"

The quantity changes to NaN

I could never find any settings on VM about that and need help.

THX

URL: geschenkkorb24.ch

an Item: http://geschenkkorb24.ch/index.php/gesc ... lass/danke

Hello

I ve got an issue on product item page.

If I add 1 item, everything works fine. But if I add more than 1, I got the an empty message with "!". After I click "ok"

The quantity changes to NaN

I could never find any settings on VM about that and need help.

THX

URL: geschenkkorb24.ch

an Item: http://geschenkkorb24.ch/index.php/gesc ... lass/danke

template: Gavern v.3.11.1vm

SOLVED:
This is issue will be solved with update to template Gavern v.3.11.2vm.

For other users, take a note:
With update all files will be overwrittet. So, make a copy of all CSS folders to your local disk and copy it back after update.

In general: MAKE A COPY WITH AKEEBA BACKUP.