Making the rounds, eh? Reddit and here!
Did you mean to enable client or did you really mean server?
When you install or update a Server certificate and delete the original, you need to run the
security ssl modify -vserver data1 -server-enabled true
(you will need other args to complete the command!)
to re-enable the server cert. If you are trying to have NA box access, you may just need the server cert.
If you truly need the client cert, then you need to install one then enable the option