Byte-range resume not available while proxied
A client asked for a byte Range (resume / partial download), but the file lives on remote or CDN storage and the download is still proxied through the main app. That path does not support partial ranges — download the full file instead.
Why this happens
Direct/presigned redirect could not be used (directDownloadEnabled off, CDN sign failed, etc.), so the app streams the body itself. Proxied streams reject Range. Full-file downloads without Range still work.
Diagnose and fix
1. Admin → Servers → [node] — enable Direct download on remote nodes; fix CDN signing so redirects work.
2. Users & limits → Resume downloads (toggle.ul2_resume_dl_*) — must be on for tiers that should resume when the path supports it.
3. Member/client: download the full file (no resume) until direct download is enabled.
4. See also the generic CDN/remote range article for the shorter catalog wording.