Hallo,
on the one hand, LinuxMint has no problem with the Gnome-Keyring-issue, it can be easily solved with ask.xmodulo.com/disable-gnome-keyring-linux-desktop.html.
One the other hand I didn’t manage to get the Nitrokey-App installed on Mint (followed the Howto on the Nitrokey-Website) it gives me:
$ nitrokey-app
nitrokey-app: symbol lookup error: nitrokey-app: undefined symbol: _ZN6QDebugD1Ev
Any hints welcome,
Nik