Problem with "where used"-function

Hi!

I'm having some troubles with the "where-used"-function. I have used Solidworks for a long time but not the Solidworks Explorer. So maybe I have overlooked something obvious. When i try to start it I get an error, as shown in attached picture. Do I need to install some PDM system for it to work?

It does start dispite the error message. But then when I check the "Where used" page, it is empty. What do I need to do for it to work?

Thanks in advance!

SolidworksSolidworks Explorer