Cannot install Sober

[MarkInCrack]

Debian 10.13 [stable,unstable]
Huayra 5.0 (austral)
Architecture x64_64 (UEFI mode)
Kernel version: Debian 4.19.316-1
Terminal process:
estudiante@juanamanso:~$ flatpak install --user https://sober.vinegarhq.org/sober.flatpakref
error: Unable to load summary from remote sober-origin: GPG verification enabled, but no summary found (check that the configured URL in remote config is correct)

And i tried downloading it from the "sober.flatpakref" file and it gave me the same error

[m-attz]

Make sure that your URL is clean (no whitespaces, etc). This usually happens when the URL is wrong (despite it not looking incorrect).