Wireguard help

Hello, I have a TP Link 2600
I upgraded and now have:
Powered by LuCI openwrt-18.06 branch (git-18.210.69179-6df9a57) /

I've been trying to get wireguard working for Mullvad vpn via : https://mullvad.net/en/guides/running-wireguard-router/

It's not working. I really need help.

root@OpenWrt:~# opkg list-installed|grep wireguard
kmod-wireguard - 4.14.54+0.0.20180718-2
luci-proto-wireguard - git-18.219.52706-a49e4e4-1
wireguard - 0.0.20180718-2
wireguard-tools - 0.0.20180718-2

root@OpenWrt:~# wg show
interface: WGINTERFACE
  public key: xxx
  private key: (hidden)
  listening port: 32

peer: xxx
  endpoint: xxx
  allowed ips: 0.0.0.0/0
  latest handshake: 17 hours, 51 minutes, 10 seconds ago
  transfer: 552 B received, 1.39 MiB sent
  persistent keepalive: every 25 seconds

Mullvad internal dns

PING 10.64.0.1 (10.64.0.1): 56 data bytes

--- 10.64.0.1 ping statistics ---
5 packets transmitted, 0 packets received, 100% packet loss