OnTap 8.3.2 System Manager Not Working

I have a cluster running OnTap 8.3.2

The cluster and node management network interfaces are active

and I can ssh to them.

The web services are up and running

Cluster::> sys ser web show
  (system services web show)
 External Web Services: true
                Status: online
    HTTP Protocol Port: 80
   HTTPs Protocol Port: 443
         TLSv1 Enabled: true
         SSLv3 Enabled: false
SSL FIPS 140-2 Enabled: false

I am using I.E. 8

When I attempt to access the filer via the GUI (using https),

using the cluster IP I get the security certificate error,

click continue to this website

The URL is https://nnn.nnn.nnn.nnn/sysmgr/SysMgr.html

The screen stays white and I am not prompted for the credentials.

Any ideas ?

Thanks in Advance