A modal loop is already in progress

After successfully validated the configuration for Windows Server 2008 R2 Clustering, I proceeded to create the cluster.

At the Access Point for Administering the Cluster stage, I clicked on the Click here to type an address which enabled the Next button.  I clicked on the Next button without typing in a valid address.

After clicking on the Next button, the following error appeared.

A modal loop is already in progress.

The error message does not seem to be useful.  However, the event log in Application and Services Logs -> Microsoft -> Windows -> FailoverClustering-Manager –> Admin does help to identify the cause.

The error log with Event ID 4683 said that The error was ' The address 'Click here to type an address' isn't a valid address.'.

This is followed by an error log with Event ID 4683 which said that The error was 'A modal loop is already in progress.'.

So basically, it is complaining that 'Click here to type an address' is not a valid address.  Well, if the address is not valid, then the Next button should not be enabled.

Anyway, entering a valid IP address solved the problem.