Array error in settings page

Hi,

I get 3 instances of the following error at the top of the settings page:

Warning: in_array() expects parameter 2 to be array, boolean given in /home/xxxxxxxx/public_html/cn-blog/wp-content/plugins/post-access-controller/post-access-controller.php on line 424

Thanks

https://wordpress.org/plugins/post-access-controller/