The desktop firewall policy has been updated for the most recent Java release:

• Exceptions for Java 8u73 (two versions back) have been removed
• Exceptions for Java 8u91 (latest version) have been added

Java 8u91 released yesterday (the 19th), the fleet should be getting rolled to the new version automatically as per Ninite running last night / this morning. Check c:\logs\ninite.log to see if there’s an entry for ‘Java 8 : OK’ as to if Ninite was able to update it on a particular machine.