Maybe there is some inconsistency with server name after upgrade. Try changing true to false in /conf/openfire.xml and rerun setup process. It shouldn’t harm your current setup.
404 means Not Found. What address are you trying to connect? Are you doing this locally? Then you can try connecting to localhost:9090
Thanks to you all, who read my question, and specially thanks to wroot for suggestion.
I just found out that my collega just installed CISCO work in that machines , so after I stop all cisco work services and restart openfire, the admin console is back to live. so i don have to worried about anything now.