Cannot deploy to test flight: The Apple Developer website is undergoing maintenance. For details, visit developer.apple.com/system-status.

I'm unable to deploy to testflight. I'm getting 2 errors, either a "504 Gateway Time-out", or this:

<!DOCTYPE plist PUBLIC "-/

<plist version="1.0">

<dict>

<key>resultCode</key>

<integer>503</integer>

<key>userString</key>

<string>The Apple Developer website is undergoing maintenance. For details, visit developer.apple.com/system-status.</string>

<key>resultString</key>

<string>The Apple Developer website is undergoing maintenance. For details, visit developer.apple.com/system-status.</string>

<key>httpCode</key>

<integer>503</integer>

<key>userLocale</key>

<string>en_US</string>

</dict>

</plist>

I've checked developer.apple.com/system-status and there's nothing wrong.

I'm in the UK, and using fastlane tools (https://github.com/fastlane/fastlane/tree/master/spaceship)