Trying to work with OpenVAS and get Status code: 503 error

[cfi]

@RAD

I forgot to mention it before, I;m using it as a VM, so if upgrade means install from scrach no problem. If yes, is there a link that I can get for an iso/OVA file?

You could use the Greenbone Community Edition (GCE) which is a ready to use and up to date virtual machine.