Our NAT VPS's use SolusVM to provision and manage your VM's. 
A recent update of our billing software has since broken the management interface that is built into the billing software. 
Your server(s) are still online and running and can be managed directly from the SolusVM interface that can be found here,
https://solusvm.gullo.me/

If you do not know your login details please check your email for an "New Service Activated" email containing your SolusVM Login details.
As always, you can find a history of all emails sent from the client area here,
https://hosting.gullo.me/client/plugin/client_emails/client_main/index

I am working diligently to get this resolved, your patience is highly appreciated.

Thanks,
Cam

Update - 10/4/24

This has been resolved.