Ran into this earlier today. If you happen to be messing with your SSL Certificates and get your "Set up your Internet Address" wizard into a state that it fails, run the Fix My Network Wizard (FNCW) and you should be good to go.
In my case, the DPCW log (C:\Program Files\Windows Small Business Server\Logs\DPCW.log) was showing in its last two entries "certcoll is null or zero count" and "closing store" with the Internet Address Management Wizard (IAMW) closing out.