After upgrade latest version virtualmin https://192.168.1.238:10000/ give blank page. no error server
Server is apache and OS is ubuntu
IS a local server?
Or local network ip on a (cloud) platform?
aws / openstack ?
DCHP or static ip?
Its local server with static local IP https://192.168.1.238:10000
i can't help you don't know with local.
You may want to try restarting Webmin/Virtualmin with this command:
service webmin restart
After that, try accessing it again. If you still see a blank page, what shows up in the logs in /var/webmin/miniserv.error?