Openwrt 18.6.x can not run dmvpn

hello everyone !
I am an ordinary user of openwrt. Previously I successfully configured dmvpn on opewrt15.5.1 and interconnected with Cisco devices.
But my configuration on openwrt18.6.x was unsuccessful.
An error is reported when starting racoon.

The configuration is based on https://iteachs.com/?p=57

root@OpenWrt:~# opkg update
Downloading http://downloads.openwrt.org/releases/18.06.7/targets/ar71xx/nand/packages/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_core
Downloading http://downloads.openwrt.org/releases/18.06.7/targets/ar71xx/nand/packages/Packages.sig
Signature check passed.
Downloading http://downloads.openwrt.org/releases/18.06.7/targets/ar71xx/nand/kmods/4.9.211-1-a0ff3510ee0f14a3d7039ea828bba375/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_kmods
Downloading http://downloads.openwrt.org/releases/18.06.7/targets/ar71xx/nand/kmods/4.9.211-1-a0ff3510ee0f14a3d7039ea828bba375/Packages.sig
Signature check passed.
Downloading http://downloads.openwrt.org/releases/18.06.7/packages/mips_24kc/base/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_base
Downloading http://downloads.openwrt.org/releases/18.06.7/packages/mips_24kc/base/Packages.sig
Signature check passed.
Downloading http://downloads.openwrt.org/releases/18.06.7/packages/mips_24kc/luci/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_luci
Downloading http://downloads.openwrt.org/releases/18.06.7/packages/mips_24kc/luci/Packages.sig
Signature check passed.
Downloading http://downloads.openwrt.org/releases/18.06.7/packages/mips_24kc/packages/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_packages
Downloading http://downloads.openwrt.org/releases/18.06.7/packages/mips_24kc/packages/Packages.sig
Signature check passed.
Downloading http://downloads.openwrt.org/releases/18.06.7/packages/mips_24kc/routing/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_routing
Downloading http://downloads.openwrt.org/releases/18.06.7/packages/mips_24kc/routing/Packages.sig
Signature check passed.
Downloading http://downloads.openwrt.org/releases/18.06.7/packages/mips_24kc/telephony/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_telephony
Downloading http://downloads.openwrt.org/releases/18.06.7/packages/mips_24kc/telephony/Packages.sig
Signature check passed.
root@OpenWrt:~# 
root@OpenWrt:~# 
root@OpenWrt:~# opkg install opennhrp
Installing opennhrp (0.14.1-2) to root...
Downloading http://downloads.openwrt.org/releases/18.06.7/packages/mips_24kc/packages/opennhrp_0.14.1-2_mips_24kc.ipk
Installing ipsec-tools (0.8.2-7) to root...
Downloading http://downloads.openwrt.org/releases/18.06.7/packages/mips_24kc/packages/ipsec-tools_0.8.2-7_mips_24kc.ipk
Configuring ipsec-tools.
Configuring opennhrp.
opennhrp[2276]: OpenNHRP 0.14.1 starting
opennhrp[2276]: Interface lo: configured UP, mtu=0
opennhrp[2276]: Interface eth0: configured UP, mtu=1500
opennhrp[2276]: Interface gre0: config change, mtu=1476
opennhrp[2276]: Interface gretap0: config change, mtu=1462
opennhrp[2276]: Interface br-lan: configured UP, mtu=1500
opennhrp[2276]: Interface eth0.1: configured UP, mtu=1500
opennhrp[2276]: Interface eth0.2: configured UP, mtu=1500
opennhrp[2276]: Interface wlan1: configured UP, mtu=1500
opennhrp[2276]: Interface wlan0: configured UP, mtu=1500
opennhrp[2276]: Filter code installed (18 opcodes)
root@OpenWrt:~# 
root@OpenWrt:~# 
root@OpenWrt:~# /etc/init.d/racoon restart
iptables: Bad rule (does a matching rule exist in that chain?).
iptables: Bad rule (does a matching rule exist in that chain?).
iptables: Bad rule (does a matching rule exist in that chain?).
iptables: Bad rule (does a matching rule exist in that chain?).
/etc/rc.common: eval: line 1: /usr/sbin/ip: not found
iptables: Bad rule (does a matching rule exist in that chain?).
iptables: Bad rule (does a matching rule exist in that chain?).
iptables: Bad rule (does a matching rule exist in that chain?).
iptables: Bad rule (does a matching rule exist in that chain?).
/etc/rc.common: eval: line 1: /usr/sbin/ip: not found
iptables: Bad rule (does a matching rule exist in that chain?).
iptables: Bad rule (does a matching rule exist in that chain?).
iptables: Bad rule (does a matching rule exist in that chain?).
iptables: Bad rule (does a matching rule exist in that chain?).
Command failed: Not found
Command failed: Not found
root@OpenWrt:~# 
root@OpenWrt:~# 

Please help me. . .