I found that if you don’t have the Groups component enabled in Buddypress, the news feed page breaks on bp-wall-loader.php, around line 317
$groups_ids = groups_get_user_groups( $user_id );
I wrapped the whole block regarding the groups with a
if ( function_exists('groups_get_user_groups') ) {
and the news feed page seems to load properly.
Hope it helps.
