Re: Get “fatal error” whenever I try to add anything to BuddyPress
WP/BP versions of the install that got fatal error? To get better attention of plugin dev for group email subsription, post in this forum https://buddypress.org/community/groups/buddypress-group-email-subscription/forum/
What theme are you using – bp-default child theme, custom BP theme or WP theme with BP Template Pack? If you change theme to bp-default theme, do you get a fatal error on activation?
Don’t blame your permissions right away 
BP Classifieds is compatible up to WPMU 2.9.2 and BP 1.2.1 only. Unless you’re on those versions, expect the plugin to break in current versions as there have been numerous major code changes since plugin was released a year ago.
