Plex has suddenly quit

Halfway through the day today, Plex stopped working. Reboot has done nothing to remedy this. Any thoughts?

What does “quit” mean?
What error message do you get?
Have you posted or checked the Plex forum for Plex related issues?

I have checked Plex forums. My bigger issue is that it only appears to be happening on WD MyCloud Home. I can learn to deal with it if I can find a way to reload the saved settings.