BuddyPress Group Calendar css wrong path

I was doing some speed testing and noticed that the BuddyPress Group Calendar css was not being found.

Then I realised why: it is looking for it in this path:
/wp-content/themes/bp-group-calendar/groupcalendar/group_calendar.css

when it should be looking for it in plugins and not themes.

Please can you advise where or what I should change in the plugin to correct this. Thanks.