How do I fix a "The resource you were accessing could not be found" error when restoring a Droplet from a snapshot?

The Restore Droplet option overwrites a Droplet’s data with specified snapshot. An error saying “The resource you were accessing could not be found” occurs when the Droplet are trying to restore no longer exists,

In this situation, create a new Droplet from the snapshot instead.

The only way to restore files from an image is to recreate a Droplet or volume from the image and copy the flies from there.
You cannot create Droplets in certain datacenters due to limited capacity. If you have snapshots in a limited capacity datacenter, transfer them to another datacenter to create Droplets from them.
You cannot downsize a Droplet from a snapshot. Data is not always stored sequentially in memory, so reducing the size of a disk can result in data loss or corruption.