-Open the IIS manager by clicking on Start--Run and then type inetmgr click OK, this will open the IIS manager console.
-Expand the Server Name on the Left side, then expand Sites, click on Symantec Web Server ,
-Right Click on Symantec Web Server you will have option Edit Bindings ,click on it and edit the Bindings and make sure IP Address is All Unassigned and Port is 8014 (It can Vary depending upon what port SEPM is using in IIS), Click on OK then close the Bindings window.
-Click on Symantec Web Server
-In the middle top left section of IIS manager modify the Group view by Area.
-Under IIS area you will see Authentication,right click and click on open Feature you will see ASP.NET Impersonation which will be enabled.
-Right click on that and click on Disable.
Restart the IISAdmin service and then start the Symantec Endpoint protection Manager service.
Issue is resolved and you can open and login into Symantec Endpoint Protection Manager Successfully.