U2F Enrollment Error

[Darren]

Every time I try to enroll my U2F token, there is a popup in the top right corner that says

"'NoneType' object has no attribute 'strip'"

Is this a problem with how I set it up?

Thanks

[Darren]

Nevermind, I'm an idiot, If anyone in the future finds this, it's because you haven't set the FQDN in the config.

Go to Config -> Tokens -> U2F and set the FQDN of the server