Have you checked to see if your license is up to date? You can check under Configuration > License.
If you find that it is, you'll need to login to the Content Security portal to get the latest license. https://contentsecurity.mcafee.com
If you do not have access to that you can email service [at] mcafee.com with your grant number and they should be able to help out. Do not post your grant # or other private information here.