I tested and was not able to reproduce the error, but here are a couple suggestions:
1) Close Protect, go into services, and restart the Shavlik Protect Console service. Open Protect and test to see if it works now.
2) It may help to perform some database cleanup/maintenance. See the following document for some help on this:
After this it would probably be best to contact support directly and get a case opened.
Thanks a lot for your tips. I've done the Database Maintenance and also restart the services, but the problem still occur. Do you know, is it possible to contact the support through ticket or mail?
Yes, definitely. You can open a case via our support portal at https://support.shavlik.com/
I'd suggest grabbing some logs from your Protect console system as well. If you can attach the logs on the case it will generally help us diagnose the issue much easier. This document shows how to go about obtaining the logs:
(You'd want to follow directions for console logging)