Registration error

Hey, get this error after register method. After debugging `u2f-api` I see that chrome return `responseData: {errorCode: 2}` in `this.port_.onMessage.addListener(function (message) ` line

```
Error: Registration failed
at makeError (u2f-api.js:77)
at callback (u2f-api.js:127)
at push../node_modules/u2f-api/dist/lib/generated-google-u2f-api.js.u2f.responseHandler_ (generated-google-u2f-api.js:625)
at generated-google-u2f-api.js:384
```

Register code:
```
const result = await u2f.register({version: "U2F_V2", appId: "https://localhost:5000", challenge: "bV4O8XSr3mo016foC9-bY5EyJ-aMRmVlSjzWsED2HUw"})
...
```