Hi Srilatha,
This is because hostname is not specified in the URL,
http:///sap/bc/webdynpro..........
it should be http://hostname/sap/bc/webdynpro......
Kindly check with your basis whether ICM/SSL is configured with icm/host_name_full correctly. If not ask them to check SSL certificate and if needed restart ICM.
Regards,
Meera