The picture tells the story.
This seems odd? The server isn’t reporting an error. The folder, collapsed, is green. Yet nothing’s actually happening, because the folder doesn’t exist on that server.
I suggest this should be reporting an obvious error to the user?
/rest/db/status?folder=cm-lu returns HTTP 200 with “error”: “folder path missing” inside the body so in the meantime I’m going to build a monitoring rule off that.
Yeah, I’ve seen the same. I think this is a new issue, as this used to behave properly before.
Picture doesn’t tell the story on which version you’re running.
Folders sometimes show as "Up to Date" despite not existing or being inaccessible · Issue #10546 · syncthing/syncthing · GitHub fixed in 2.1.3, @tomasz86 you filed it 
Touché. My apologies for not searching the issues.
As always, my deepest appreciation for this fine, fine software.
