Error when adding port variable

[dundee31416]

I tried to add a port variable to be able to access the webUI of another container, but i cant start the nordvpn container when i add this port. Without this additional variable, the docker starts and is able to connect correctly.

root@localhost:# /usr/local/emhttp/plugins/dynamix.docker.manager/scripts/docker run -d --name='nordvpn' --net='bridge' -e TZ="America/New_York" -e HOST_OS="Unraid" -e HOST_HOSTNAME="UnraidNAS" -e HOST_CONTAINERNAME="nordvpn" -e 'USER'='something@email.com' -e 'PASS'='XXXXX' -e 'CONNECT'='' -e 'DNS'='1.1.1.1,1.0.0.1' -e 'TECHNOLOGY'='OpenVPN' -e 'CYBER_SEC'='False' -e 'NETWORK'='192.168.0.0/24' -l net.unraid.docker.managed=dockerman -l net.unraid.docker.icon='https://raw.githubusercontent.com/josopu/unraid-template/main/nordvpn.png' -p '5600:5600/tcp' --device /dev/net/tun --cap-add=NET_ADMIN 'bubuntux/nordvpn'
02a3a124a5405bcdcbc0cb2667ae767feeb52c369114b36ef8aee53d174642c9
docker: Error response from daemon: driver failed programming external connectivity on endpoint nordvpn (da10c61b348ce0a5ac3c3b1175abf287af5c602b20d0f08809dda60a7ba14428): (iptables failed: iptables --wait -t filter -A DOCKER ! -i docker0 -o docker0 -p tcp -d 172.17.0.5 --dport 5600 -j ACCEPT: iptables: No chain/target/match by that name.
(exit status 1)).

The command failed.