Problem with 2FA Security Key

Hello,
I haven’t been able to login to https://gitlab.com/users/sign_in in the past few days.
I have a Security Key (https://www.yubico.com/products/yubikey-hardware/yubikey4/) connected with my account and used to work well. It used to show a button to try to communicate with the security key (which is connected and working well for other websites), but now this is all I get: http://prntscr.com/dxpixn. Also, that button shown in my screenshot isn’t doing anything, even if I try to click it.

Any suggestion?
Thanks

up. I’m still unable to login to the website…