Failure (Can't find resource for bundle java.util.PropertyResourceBundle, key AlertMail.REQUEST)

Failure (Can't find resource for bundle java.util.PropertyResourceBundle, key AlertMail.REQUEST)

Hello!
I have some problem with email notifications.
I've created test alert by Settings - Firewall - Alarm Profiles with notification to admin email. At dashbord i see this allert, but allso have error - Failure (Can't find resource for bundle java.util.PropertyResourceBundle, key AlertMail.REQUEST)
Mail server settings is correct, test message is ok.
Please help.

                New to ADSelfService Plus?