Warning on line 247 of restrict-categories.php

Using latest (2.5) version of the plugin.

Receiving this warning as soon as the plugin is activated:

Warning: Invalid argument supplied for foreach() in C:\xaxxxx\xxxx\xxxxx\wp-content\plugins\restrict-categories\restrict-categories.php on line 247

https://www.ads-software.com/extend/plugins/restrict-categories/