FMS 13: port 16000 and /fmi/webd aren't loading correctly
I installed FMS 13 on a Windows 2008 Server VM. It was working and I was playing with the IIS configuration. It somehow got to a state where loading port 16000 and /fmi/web/ stopped working.
I've tried uninstalling and reinstalling FMS 13 and removing IIS as a role and re-adding it. Neither worked.
When I load the server's IP:16000, I just see the generic "FileMaker Database Server Website" text with the large blue icon with the T on it. It used to load a different page with server info and links, and the link to start the admin console. Manually loading IP:16000/admin-console says, "The resource you are looking for has been removed, had its name changed, or is temporarily unavailable."
If I load IP/fmi/webd/ is returns the same error, "The resource you are looking for has been removed, had its name changed, or is temporarily unavailable."
What is going on here? How do I fix this so that it works like it did the first time I installed it?