Custom Sidebars Warning: Missing argument 2 for apply_filters()

Hello,

I am getting the following error message inside my widgets and above my header on the site. I am using multi site but the errors are only being displayed on http://myinsurancepage.com/.

Warning: Missing argument 2 for apply_filters(), called in /custom-sidebars/inc/class-custom-sidebars-visibility.php on line 750 and defined in /wp-includes/plugin.php on line 177

I have followed the instructions outlined in this thread but the error is still present.
https://premium.wpmudev.org/forums/topic/error-message-in-widget-window-when-using-sidebars-pro#post-893786

Any thoughts?

Support access is ACTIVE until September 15, 2015 4:32 pm

Thanks,
William