Vpn+Port Forwards error

Hello good afternoon, I have a wrt1900acs router with Openwrt 18.06.1.
connected to a Qnap server, (teamspeakserver and apache web etc when I redirect the ports to enter from outside my network (I also have fixed IP and domain) works fine.
But when I install on the VPN-client router the vpn works fine but it no longer redirects me the ports.
If you can help me
sorry for my English.
Regards, and thank you very much.

You have to use policy based routing for your server to always use WAN, and not VPN.

config route                
	option interface 'wan'
	option target ''
	option netmask ''
	option gateway 'xxx.xxx.xxx.xxx'
	option table '2' 

config rule
	option src '192.168.1.xxx'
	option dest ''
	option priority '2'
	option lookup '2'

Sorry I forgot:
the client qnap server does not pass through vpn, I only have 4 clients that pass through vpn, Policy-Based Routing.

Then fix your policy-based route.

I already have the policies, but I still can not redirect.

If I understand you correctly, you need to permit forwarding from VPN to LAN in order for devices connected on the VPN to reach the LAN server.