I haven't seen that error before. Is this a new universal server install or an upgraded one?
I notice that universal server gets a little 'weird' if it runs out of the hard drive space, so i'd check to see if that's an issue. There are two ways to check on hard drive space, if you have email alerts being sent the daily email will say how much HD space is being used, the other way is to ssh to the server.
[root@pgptestserver ~]# df -kh
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 7.7G 3.8G 3.6G 52% /
/dev/sda1 99M 17M 78M 18% /boot
tmpfs 506M 8.0K 506M 1% /dev/shm
Support is extremely backlogged, PGP *really* needs to hire more people ASAP :)