Security key fails with Proton apps

I am trying to log in to the Proton apps (Proton Mail, Proton Pass etc.) with a Yubico Security Key, but after the stage where I insert the key I get an error message and the login fails. Does anyone have any solutions to this problem?

I have used the security key with other apps on the same phone, so both the phone and the security key should be fine. I have also managed to log in to the Proton apps using codes from an authenticator app.

I am new to /e/OS, so I don’t really know where to begin troubleshooting and try to change settings. I am using /e/OS v3.2 on a Fairphone 6.

Just as a first pass, does :magnifying_glass_tilted_left: Search proton + bridge help?

Also experiencing Yubikey issues. I have a 5C, and when I plug it into my FP6 (latest e/OS version, 3.2), it just displays the code from the key as if I’ve typed it out, doesn’t register the ‘touch’. So keeping an eye on this thread for any resolution.

It doesn’t get me any further, but that might be because there’s something that eludes me. The way I understand Proton Bridge is that it has to do with using proton with other email apps.

in logcat, Proton Mail (or Pass) doesn’t complain at all. It’s so quiet that I think it is a deliberate decision to not give any debug to attackers.

I’d post this to the protonmail subreddit as microg issues has nothing on this (being transparent about the use of microg). Seems people from proton follow up. Links this thread maybe

you get this error popup in the login form?

“Incorrect login credentials. Please try again.”

in logcat microg is happy with the fido key interaction:

D FidoUsbHandler: Yubikey 4 OTP+U2F has permission
  ...
D FidoCtapHidConnection: Received CtapHidMessageResponse(statusCode=0x-7000, payload=xyz) in 2 packets
D FidoUi  : Finish with success response: AuthenticatorAssertionResponse[keyHandle=xyz, clientDataJSON=xyz, authenticatorData=xyz, signature=xyz-xyz]

Yes, that is the error popup I get. Thank you for your reply. Good to know I could rule out any settings with e/OS. I’ll see if I can get a response from Proton.