Robots.txt

The solution I offer for now is to add a couple request_uri checks in three places to kick the plugin back to normal while on the robots.txt (and the wp-activate.php).

I think this works for me.

Here…

function ds_users_authenticator () {
		if( strpos($_SERVER['REQUEST_URI'], 'robots.txt')) return;
		if( strpos($_SERVER['REQUEST_URI'], 'wp-activate.php')) return;

		if ( !is_user_logged_in() ) {

and here…

function ds_members_authenticator() {
		global $current_user, $blog_id;
		if( strpos($_SERVER['REQUEST_URI'], 'robots.txt')) return;
		if( strpos($_SERVER['REQUEST_URI'], 'wp-activate.php')) return;

		if( is_user_member_of_blog( $current_user->ID, $blog_id ) || is_super_admin() ) {

and here …

function ds_admins_authenticator() {
		if( strpos($_SERVER['REQUEST_URI'], 'robots.txt')) return;
		if( strpos($_SERVER['REQUEST_URI'], 'wp-activate.php')) return;

		if( current_user_can( 'manage_options' ) || is_super_admin() ) {

Let me know if that works for you and I’ll roll it out through the plugin updater later.

Done