[REUSE] api.reuse.software doesn't see any file

[McSinyx]

Hai,

I am wondering about the difference between the following outputs:

https://api.reuse.software/info/trong.loang.net/~cnx/rub
https://xong.loang.net/log/reuse/7

On my local machine (running GuixSD) and VPS (running NixOS,
log linked above), reuse lint shows the expected output.
However, the API does not recognize any file:

> * Files with copyright information: 0 / 0
> * Files with license information: 0 / 0

Is this a bug or did I misconfigure something?

Bests,
McSinyx