Undefined index: nofollow_blogroll

i am using wordpress 4 and i got this error on every ajax request and every page i open please improve the condition.

please change this condition
if( $options[‘nofollow_blogroll’] ) {
}

to like this.

if( isset($options[‘nofollow_blogroll’]) && !empty($options[‘nofollow_blogroll’]) ) {
}

i got this error about your condition please checked in new version and review.

Notice: Undefined index: nofollow_blogroll in /home/rankjane/public_html/wp-content/plugins/nofollow/nofollow.php on line 66
/>

my some ajax request is broken about this notice please checked.

Thank you.

https://wordpress.org/plugins/nofollow/