I have not seen your enviornment but i can certainly guide here .

RequireKerberos is the Dword registry value that ensures whether you are using kerberos authentication or not for a Network Name resource.if its 1 its enabled else its 0 [default].

So what i feel is ,In case you are using kerberos authentication check the resources that its checked in the check box (go to properties of the Network Name resource.)

Else you can go to the registry and change this value to 1 or 0 as per your enviornment need and if the setup gives you the option to retry , do it .Else run the setup again .If you do not have the permissions to change the registry keys let someone with that permission do that .

you can find this key under registry HKLM\Software\Microsoft\Microsoft SQL Server\MSSQL.x\Cluster()

hope this helps