Looks like that Dr.Web key is not linked to your Plesk parent license key. I think the issue can be resolved by contacting the sales department and purchasing a new valid license.
Thank you. I contacted support and they provided a new license key for Dr.Web. I'm not getting that error message but I also don't think Dr.Web is running. I tried looking at the log file but there is nothing in the folder where the log file should reside. I don't see a log file in /var/drweb/ or in var/logs/
I'm not sure where to start troubleshooting Dr.Web. Any suggestions?