I'm trying to setup yubikey 5nfc for 2fa in fastmail app.
I have already set one up on desktop browser no problems.
In the app - when prompted to insert yubikey, vanadium flashes up with app.fastmail for a second, then I get a 'something went wrong error' back in the app.
I have tried changing a few settings for vanadium and fastmail apps but no joy. Change default browser to ironfox and the same thing happens.
Something is preventing fastmail app accessing the yubikey interface.
Yubi authenticator app works OK and can see the device when inserted.
Any advice would be greatly appreciated.
Thanks.