Chat not working on subsite

Hi,
This is a multisite, and on the subsite: https://nettsidesupport.no/deltaregnskap/ I am trying to use your chat plugin.

I am not able to make it work. It will not show on frontpage nor as widget.

I am not able to find instructions on how to use it. Do buddypress has to be installed? Must users be logged in to chat?