Suppress red banner message from Q&A plugin

How do I suppress this warning message: "[Q&A] After Visitor Submits a Question setting requires registration of the visitor, but your website is closed to registrations. You may consider to fix this using plugin settings or Wordpress settings." ---- I realize my site is closed to new registrations. That is not a problem. I don't want to see the message any more!
Thanks,
Marlene