Hi,

As far as I can see in the official documentation, backups are taken once weekly for each Droplet where they’re enabled and are retained for four weeks:

https://www.digitalocean.com/docs/images/backups/

So this means that if you’ve not been using your account for more than 4 weeks then your backups are not longer there.

What I could suggest is just creating a new droplet and uploading your project again.

Hope that this helps!
Bobby