riverthia

Ok. I get it. The bug is in private_group_enforce_permissions() function (/wp-content/plugins/bbp-private-groups/includes/functions.php:line 109)
The header() calls must be followed by exit; statement. This is my version

function private_group_enforce_permissions() {
global $rpg_settingsf ;
// Bail if not viewing a bbPress item
if (!is_bbpress())
return;

// Bail if not viewing a single item or if user has caps
if (!is_singular() || bbp_is_user_keymaster() )

return;

if (!private_groups_check_can_user_view_post()) {
if (!is_user_logged_in()) {
if($rpg_settingsf[‘redirect_page2’]) {
$link=$rpg_settingsf[‘redirect_page2’] ;
// header( “Location: $link” );
wp_redirect($link);
exit;
}
else {
auth_redirect();
}
}
else {
if($rpg_settingsf[‘redirect_page1’]) {
$link=$rpg_settingsf[‘redirect_page1’] ;
// header( “Location: $link” );
wp_redirect($link);
exit;
}
else {
bbp_set_404();
}

}
}
}