Wordfence Alert: Missing Authorization to Notice Dismissal

Hi!

We’ve received a critical alert from Wordfence about the WP Responsive recent post slider: Missing Authorization to Notice Dismissal

If there is a security vulnerability, can this be fixed by the developer or should I deactivate the plugin?

Extra detail on this Wordfence link: Multiple WPOnlineSupport Plugins <= (Various Versions) – Missing Authorization to Notice Dismissal (wordfence.com)

The page I need help with: [log in to see the link]