Flatpak install error: Unacceptable TLS certificate

[erikderzweite]

When I try to install version 2.0.1 via flatpak I get following error:

Error: While downloading https://archive.org/26/items/pinball_202007/Pinball.zip: Unacceptable TLS certificate error: Failed to install com.github.k4zmu2a.spacecadetpinball: While downloading https://archive.org/26/items/pinball_202007/Pinball.zip: Unacceptable TLS certificate

I can install other software via flatpak without this error.

[k4zmu2a]

A third party provides the flatpak, I cannot give advice on its internals. Based on error text, I could guess that the problem is with HTTPS access to archive.org. Assuming that archive.org has valid certs, the issue is most likely on your side, something wrong with CA certificates perhaps.