Installing on Ubuntu 15.04 - Error help!

Followed GitHub Easy instructions and i got this error.

administrator@skserpserver:~$ sudo bash --setup-production
Installing for Ubuntu vivid amd64
In case you encounter an error, you can post on

Adding ubuntu mariadb repo
Installing packages for Ubuntu. This might take time…
Installing wkhtmltopdf
Cannot install wkhtmltodpdf. Skipping…
Adding frappe user
fatal: destination path ‘bench-repo’ already exists and is not an empty directory.

What does this mean? And any instructions i can follow? I’m a beginner at this. Thanks!

Do you have any fail attempt?

You can remove bench-repo and frappe-bench folder and try installing again.
But its good if you try installing on new clean server.