Unable to access HA locally

Hi all, I am currently unable to access my home assistant locally. However, I am able to access it via my openvpn which is setup on the asus router.

A breakdown of how the connection is at the moment:

Home PC (connected via LAN): Unable to access
Home WIFI : Unable to access
Connected via OpenVPN: Able to access

I have tried all the URL like http://IP:8123, http://homeassistant:8123

My homeassistant is currently hosted using DSM virtual machine manager.

Appreciate the advise.

Thank you.

Did you try https:// ?

Yeap, I have tried https:// as well but didnt work