I'm having problems installing the plugin "Who Sees Ads"

I'm having problems installing the plugin "Who Sees Ads", the following message appears and can not access my site. I have to get into cpanel and delete the plugin manually.

Fatal error: Call to undefined function get_blog_option() in /home/graficad/public_html/suitecriativa.com/wp-content/plugins/whoseesads/whoseesads.php on line 386

Please, I need a solution for this plugin is very precious to me.