Most of the time i am working in the visitor log but today i tried to make some statistic for the differnt devices on my site and i recive no results in the device tab.
When i go to the visitor overview i have no statistics for some months but the visitor log is full with this months.
The only thing i changed since my first installation were some autoupdates from the piwik backend.
Any ideas why i have no data in the previous months?
the solution was this guide