I installed firewalld in Ubuntu 18.04. I then removed it.
Now I am having errors trying to install wordpress app
here is the error in debug
server error: (HTTP code 500) server error - driver failed programming external connectivity on endpoint 95c92eae-9ce4-4d12-b61c-b29eee7a5a2c (bdcc609663953b1bd386a347ee9781c62140f856b7deb46c3405b08ce69f5fd3): (iptables failed: iptables --wait -t nat -A DOCKER -p tcp -d 127.0.0.1 --dport 45039 -j DNAT --to-destination 172.18.0.5:8000 ! -i br-05f6896894d2: iptables: No chain/target/match by that name. (exit status 1))