I did a downgrade on the host system back to the version currently in testing 0.23.18 and it works again.
There are some on-going discussions on the rolling release distros: https://forum.manjaro.org/t/update-2020-01-26-has-a-bug/121375/6 https://bbs.archlinux.org/viewtopic.php?id=252390 https://github.com/flathub/com.valvesoftware.Steam/issues/526 >From what I have gathered this requires a change of the runtime to interface >with the p11-kit daemon correctly. But I don't know if that is something that >can be quickly fixed on your side. Jan 29, 2020 00:05:14 Simon McVittie <s...@debian.org>: > On Tue, 28 Jan 2020 at 22:50:31 +0100, Lennart Weller wrote: > > > Currently all SSL connections, probably mostly HTTPS, will fail with > > flatpak due to a major API change in p11-kit as discussed in the merge > > request[1] for p11-kit 0.23.19, cause obviously a patch-version changes > > major API endpoints. > > > > Is there something that can be done in the Flatpak executables to make > this work better, or is it a problem with the freedesktop.org reference > runtime? > > Is this triggered by the new p11-kit in the host system, or by the new > p11-kit in the runtime, or by them being on opposite sides of the 0.23.19 > version threshold, or what? > > Thanks, > smcv >