Update Problem with new Jami this morning

Hi there,

this morning Jami told me that an update is available. So I started the suggested procedure.

And then I got this: (took a snapshot JamiUpdate|690x403
Any ideas whats wrong ?

My pc environment:
Windows 7/64
Ram 16 GB

Fritz Box 7560
IPv6 disabled at router level and on all PCs

Thanks in advance,