I can't really help you as I've never run into this issue before on any environment. Try it in a Virtualbox VM, and it should work just fine.
I've run the installer on real linux machines, virtual machines, proxmox virtual machines, and more... though, I've never tried using Digital Ocean for anything. Also, there is no 14.5 version of Ubuntu. I'm assuming you meant 14.04.5?
EDIT:
It looks like DigitalOcean uses KVM virtualization, which is also what I use on my servers, so it should work just fine. Did you insert some kind of weird character? Is the account using the bash shell as their default shell? Are your running the script as the root user or using sudo? Does it show the following when you run this command for the user you're running the script as sudo?
cat /etc/passwd
User should have the following for their shell (bolded part means it's good):
user:x:1000:1000:user,,,:/home/user:/bin/bash
What are your keyboard settings? Also which version / installation instructions are you using?
http://ehcpforce.tk/download.phpWhat is the email address you're attempting to use? You can send me a private message here on the forums with the email address if you don't want to post it out there for the whole world to see (which I'd understand).