Fritz NAS


I was running an old version of Volumio for years now.
Today I updated Volumio to the newest version.

Before this, using Volumio has been convenient. Volumio was connected to the FritzBox built in NAS, so Volumio was able to access the stick connected to the FritzBox-Router.

But, after updating, Volumio tells me it ca not access the FritzBox-NAS.

What is different, how can I solve this?