Server Admin – servermgr_info error

Something (as yet unknown, although I suspect my self-signed SSL certificate may have expired) caused my webserver (at least the secure portion) to be unresponsive. I tried to restart the server, but the finder was being unresponsive as well. So I was forced to hard-reset the server. It booted back up ok, but now the Server Admin is not working properly. After connecting to the server, I get the message

A service has encountered an error … (“servermgr_info” server-side plugin may have unexpectedly quit)

I found the file

/usr/share/servermgrd/cgi-bin/servermgr_info

and even tried replacing it with a copy from another OS 10.4 server (thinking that perhaps the file got munched in the force-quit, but that didn’t help.

I downloaded a new copy of the Server Admin Tools, but they won’t install when you already have them, and I see no way to uninstall the ones I’ve got.

Any thoughts?