Cannot register Solo v2 USB A to any Website

[pohlm01]

Hello,
I'm having trouble using by Solo v2 for FIDO U2F. When trying to add the key as second factor either for Google or 1Password using either Chrome or Firefox, I'll get prompted by the browser to proceed and the key starts blinking.
As long as I touch the key, it only blinks blue (compared to blue/green before).
As soon as I release by fingers from the key, it continues to blink blue/green, but nothing else happens. After a while, the key setup times out.

max@max-XPS:~$ uname -a
Linux max-XPS 5.19.0-38-generic #39-Ubuntu SMP PREEMPT_DYNAMIC Fri Mar 17 17:33:16 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
max@max-XPS:~$ solo2 ls
Solo 2 F75B625AAD79C459B4D8B0ECA4A5EF5C (CTAP+PCSC, firmware 2:20220822.0, locked)

I also applied the udev rules from this repository.

Do you have any idea what the problem could be, or how to continue debugging?

Thanks for your help!