Comment # 2 on bug 1230023 from Alexandre Vicenzi

Can you test the new Proton VPN package on Leap 15.6?

Theoretically, it should not have issues with credentials, authentication, and
connections, but this version is still unstable IMHO and new errors can be
found.

You can install with:

> zypper ar -ef https://download.opensuse.org/repositories/home:/avicenzi:/proton/15.6/ proton
> zypper in proton-vpn

The package is not yet available in the official repos, but I managed to get it
working on Leap 15.6.

This app replaces the old protonvpn-gui.
I plan to submit it to Leap soon.