WordPress 3.8 url guessing

Tried to access page with url new.selonija.lv/vesture (with actual new.selonija.lv/selonija/vesture) and befere it worked, after your pluggin activating, url guessing does not work.

Here’s the error message on white page.

Notice: Trying to get property of non-object in /home/selonija/public_html/Selonija.lv/wp-content/plugins/wordpress-access-control/wordpress-access-control.php on line 295

Warning: Cannot modify header information - headers already sent by (output started at /home/selonija/public_html/Selonija.lv/wp-content/plugins/wordpress-access-control/wordpress-access-control.php:295) in /home/selonija/public_html/Selonija.lv/wp-includes/pluggable.php on line 896