No SFTP-enabled storage server
SFTP flows report No SFTP-enabled storage server. (or close variants) when no active server has SFTP ingest turned on.
Why this happens
All servers have SFTP off, are offline/trashed, or none exist. Distinct from Storage server is not available for SFTP uploads (a chosen server cannot accept the ingest).
Diagnose and fix
1. Admin: enable SFTP ingest on at least one storage node (SFTP on storage nodes).
2. Confirm the server is online and not in trash.
3. Retry SFTP authenticate/upload.
4. See No storage server has SFTP ingest and SFTP ingestion disabled on this server.