Runtime error when clicking collection folder with non default language

Hello,
with a self hosted razuna system (V1.6.5) hosted on ubuntu 14.04 amd64/tomcat7/java-1.7.0-openjdk-amd64 we have the following bug:

we have created a tenant with default language English. The we added language German for tenant. After creating in Collections View collection structure and assigned assets to it. Wenn accessing collection view with the language we enabled while we had created the tenant all is ok. But if we switch language to language later enabled (i.e. German)
going to collection view we can navigate the folders but if we click on the collection link we got error:

Oops, something really strange happend here…
Expression Error

razuna error log
bderror log

How can we resolve this without creating new tenant with default language German an strating from scratch adding assets and collections?

Thanks in advance
Thomas Melzer
bineo Media GmbH

Thanks for reporting this. We will address it in the upcoming 1.7 release.

Do you think that there is any workaround / fix that can be applied to our 1.6.5 installation?

Thanks in advance
Thomas Melzer
bineo Media GmbH

We are releasing 1.7 this weekend so I would wait till Monday and upgrade to 1.7.