Can Ping From LAN not From WAN

Hi All,

I’m using Telktnoika RUT240 Router and I have an issue accessing the devices on LAN via VPN.
As per the Routing table, the whole LAN range is opened . (LAN) via

I can ping the device from diagnostic - ping utility from WebGUI, but can not be pinged/access through the VPN access.

I’ve been using firmware 1.14.4 and tried downgrading to 1.14.1, but there is no change.

Thanks for help.