Server deleted after inactivity?

I created an aternos server a while ago and decided to stop playing for a few months because I had other things I was busy with. I regularly made backups for the server. Just now, I opened up Aternos and found my server was completely gone -- there was the "Create a server" button even though I should have a pre-existing server... do servers get deleted if I don't play on them? Is there any way to recover my server?