Hi, the corresponding upstream bug is https://github.com/solokeys/solo-python/issues/110.
The problem is that python-fido2 0.9 is not backwards compatible with 0.8. It's very unfortunate that the python-fido2 maintainers uploaded an backwards incompatible version right before the freeze :-/
And I doubt that there will be a fix for solo ready in time - so either pthon-fido2 is downgraded to 0.8 again or we will not have solo in stable :-/
Anyway, I'll have a look and see if I can find a fix. Best, Philip

