File available to Premium members only
The download landing page blocks non‑Premium viewers when the file has isPremium set. Short wall copy without the longer sign-in/upgrade sentence.
Why this happens
File flag Premium-only; viewer is not owner and not Premium / Premium Pro. New uploads may default to premium when Files premium by default is on. API mint/stream often uses the longer for Premium members only guest/member messages instead.
Diagnose and fix
1. Visitor: sign in with Premium / Premium Pro, or ask the uploader for a non-premium file.
2. Admin/uploader: clear the Premium flag on the file if it should be free.
3. Review Files premium by default and Public / premium file flags.
4. Sell plans under Plan & pricing — Premium plans.