Can not connect to lan devices from openvpn

Hi

Earlier after connecting to openvpn I was able to connect to devices in the lan.(eg. yunohost server through lan ip, printer on lan,etc). But from last month I am not able to connect to internal lan devices after successful establishment of openvpn connection to yunohost server.
There are lots of blog on the internet about it.
https://forum.openwrt.org/viewtopic.php?id=35575
https://superuser.com/questions/537668/why-cant-my-openvpn-client-access-machines-on-same-lan-as-openvpn-server
https://superuser.com/questions/756362/openvpn-connected-but-not-routing-ping-test-fails

But I cannot the solution. Anybody has the solution ?

Thanks