This is a tough one. I can't recall seeing this error before, and I can't find it in our databases. It seems logical that the Admin Console is unable to write certificate information to your client, but I am not sure. Do you have command line access to the firewall? I think it would make sense to look at the audit on the firewall while trying to connect.
Also look at the output of "df" to see if any partitions are full.
I have this error with one of the firewalls I manage, and it appears to be a client side error, as I reimage the windows machine running admin console, and then the error will go away for a period of time. I am hoping that when I upgrade this firewall in the near future, that this behaviour will disappear.