The intended process has three parts: enter a username, check the result, and save an available file.
A future working lookup may have request limits or periods of unavailability. Repeated use is not promised to be unlimited. Work from the status shown for each request and avoid treating one successful download as a guarantee that every other item will be available. A small, purposeful collection of approved files is generally easier to manage than saving everything without a plan.
If something does not work, check the username and read the response before trying again. Downloads are temporarily unavailable; please try again later. This message does not establish whether a particular account is private or its Stories have disappeared. Do not submit passwords to unlock more content. For a time-sensitive project, ask the creator for an approved file or use your own backup, keeping the source and any reuse instructions alongside the material you choose.