BuddyPress.org

What happens when you disable FeedWordPress?

If the errors go away, then there is an incompatibility issue with that plugin and the current version of BP and/or version 2.8.4 of WPMU. Contact the plugin developer, provide them with the details about your issue, and ask when the plugin will support BP 1.1.1 and WPMU 2.8.4.

Looking at the listing for FeedWordPress ( https://wordpress.org/extend/plugins/feedwordpress/ ), it does not mention that it is even compatible at all with BP. It also indicates that it is only compatible up to version 2.8.1 of WP.