I found a support article but it doesn't solve my problem:
Can't find FileMaker Support email to contact (we have a maintenance contract) so if someone has a link for that would be great.
Before I did the upgrade from v13 to v14 I logged into the admin console via Safari (on a remote machine, not on server) to disable the database server. So I know its not a firewall issue unless there are new ports v14 uses the need to be opened. This is the error message I get when I use Firefox. I get the same error for Safari:
Anyone have any suggestions?