It would appear that your DNS Settings aren’t set (meaning it is unable to connect to the internet/network correctly in general). If you have webmin installed (default in MineOS Turnkey), you can go there to configure DNS and IP settings…or, via the control panel that shows once the OS’ startup finishes (again, default in MineOS Turnkey)
You might want to use 8.8.8.8 and 8.8.4.4 as the DNS (Google’s Public DNS Service).