I guess you defined your VPN qube as default ‘Net qube’. any qube > vpn > sys-firewall > network
This will route all traffic through the vpn tunnel therefore you cannot access your local network.
You can see and define the ‘Net qube’ in each qube individually, just open the qube ‘Settings’.
Now, if want to access your local LAN you can open i.e. a web-browser in a disposable qube afterwards go to the settings of this disposable qube and set it to sys-firewall, click on ‘Apply’ and try to connect to your router or printer.