My Wed Address Already In Use after Upgrading to 4.9

My subsonic 4.9 server got corrupted somehow. When I'd try to access my server on the web I'd get this error HTTP ERROR: 503 SERVICE_UNAVAILABLE. I uninstalled subsonic and deleted all my settings. I started over from scratch. The install and set up went fine but when I tried to set up my web address it would say that my address is already in use. Here is what's weird. So on a whim I tried installing an older version of subsonic (I installed 4.6) and my web address registered fine. No issues accessing it at all. When I upgraded to 4.9 again I was getting the same web address is already in use problem. Any suggestions would be greatly appreciated.