Murphy's law states that if things can go wrong, they will. Ideally in the worst possible way.
For us, that meant having our servers disconnected at 00:00 on a Sunday 1st (so likely a scheduled deprecation on their end).
Our main storage backend became entirely unreachable. For the average user that meant not being able to access the library and download files, and for us that meant not being able to connect to it and see what was wrong.
Turns out that Hetzner has decided to cancel our account and terminate all servers. There was no warning (yes, we checked our spam folder), and nobody could be reached before Monday morning.
When reached, they could not explain the reason for the cancellation:
Them: - We sent you an email.
Us : -We did not receive it, can you please resend?
Them: - We can't
Us: ಠ_ಠ