Hello! I have no idea where to report this.
After a recent update on Linux Mint Xfce 22.3, entering my password after opening Proton Authenticator results in it freezing and then crashing.
I attempted to uninstall and reinstall the app, however it did not resolve the issue.

It also appears that it's an issue happening across multiple Linux distributions, as reported in the comment section of proton-authenticator-bin package in the AUR: https://aur.archlinux.org/packages/proton-authenticator-bin