SSH not available when creating Docker Machine through Digitalocean

When running the command:

docker-machine -D create --driver=digitalocean --digitalocean-access-token=xxxxx --digitalocean-size=1gb test

I get the error:

Error creating machine: Error detecting OS: Too many retries waiting for SSH to be available. Last error: Maximum number of retries (60) exceeded

The output

Waiting for SSH to be available...
Getting to WaitForSSH function...
(blog) Calling .GetSSHHostname
(blog) Calling .GetSSHPort
(blog) Calling .GetSSHKeyPath
(blog) Calling .GetSSHKeyPath
(blog) Calling .GetSSHUsername
Using SSH client type: external
Using SSH private key: /home/myname/snap/docker/321/.docker/machine/machines/blog/id_rsa (-rw-------)
&{[-F /dev/null -o ConnectionAttempts=3 -o ConnectTimeout=10 -o ControlMaster=no -o ControlPath=none -o LogLevel=quiet -o PasswordAuthentication=no -o ServerAliveInterval=60 -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null root@xxx.xxx.xxx.xxx -o IdentitiesOnly=yes -i /home/myname/snap/docker/321/.docker/machine/machines/blog/id_rsa -p 22] /usr/bin/ssh <nil>}
About to run SSH command:
exit 0
SSH cmd err, output: fork/exec /usr/bin/ssh: permission denied:
Error getting ssh command 'exit 0' : ssh command error:
command : exit 0
err     : fork/exec /usr/bin/ssh: permission denied
output  :