When using on your page, everything seems to work. As soon as I download the code from github and install on any other webpage, without any change, I get an assertion "none". Parameters and requests are the same, and responses (changing the dynamic part, only), but the attestationObject is a lot smaller on my installations. In your website is about 4000 length, and on mine are about 195. I tried different domains, even one on production, but same problem. I'm not sure if I'm missing something. I also updated the last FIDO MDS, but same result, and problem seems to be on client side. I'm really lost, here.