getaddrinfo: nodename nor servname provided, or not known (SocketError)

The host url that I'm requesting is `https://api.push.apple.com/....`
The actual url is the push token appended to the above url:

Therefore the actual url becomes `https://api.push.apple.com/..../` which is `uri`

`notification = RubyPushNotifications::APNS::APNSNotification.new tokens, { aps: { alert: 'Hello APNS World!', sound: 'true', badge: 1 } }`

`pusher = RubyPushNotifications::APNS::APNSPusher.new(File.read('Certificates.pem'), true, password, { host: uri })`

On `pusher.push [notification]` I get `getaddrinfo: nodename nor servname provided, or not known (SocketError)`.

The uri works perfectly via curl.