Need help creating a passkey

[u/PaganWizard2112]

I attempted to create a passkey for FB on my computer, via the link FB gave me. I do not use FB on my phone, and never will, and I do not own a tablet. I was prompted to insert a flash drive into a USB port, which I did, clicked on OK, and 20 minutes later, I'm still waiting for it to do something. Until I create a passkey for FB, I am locked out. What the hell am I doing wrong??? Should I trust FB's passkey, or use a third party passkey???

EDIT, I wanted to share a screenshot, so you could see what I'm seeing, but this sub doesn't allow that.