GL-AX1800 / FW 4.2.1 / WAN access to Router / LAN devices with VPN-client/server enabled

The machine accessing the router is not using the VPN (e.g. a computer in the office)
There is a port forwarding rule from WAN->LAN in place:

I enabled the option “Allow Access WAN” but no difference with activated VPN-Client.

Screenshot from protocol for successful connection (with deactivated VPN-client:


When I activate VPN-client I don’t see anything in protocol but receive from the connection computer:
image