I guess I didn't explain well enough - I thought I covered the bases. (I seem to have a knack for that...) My apologies.
I am using the binary version DL'd from the site, as I was aware the repo version is out of date.
Depending on what you mean by "locally," I am unable to connect. Again, I can access the library with the Calibre GUI client on all machines (either through NFS share on Linux machines, or Samba on Windows ones.) I cannot access via localhost:8080 or 192.168.1.2:8080. I also cannot access via xxx.x.x.x:8080. (Public IP)
Earlier tonight, I was able to access the web version without problems.
I have also attempted stopping and restarting the server itself, as well as rebooting. A few times, the script start issued an "Aborted" message, but the next attempt would not.